/* ============================================
   THE MODERN STUDENT - DESIGN SYSTEM
   iOS/Apple-inspired aesthetic
   ============================================ */

/* ============================================
   CSS RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #000000;
    --color-bg-secondary: #08080a;
    --color-bg-tertiary: #0f0f11;
    --color-bg-elevated: #18181b;

    /* Glass effects - refined */
    --color-glass: rgba(24, 24, 27, 0.65);
    --color-glass-light: rgba(39, 39, 42, 0.55);
    --color-glass-elevated: rgba(52, 52, 56, 0.45);

    /* Light accent colors for premium feel */
    --color-pearl: rgba(250, 250, 252, 0.03);
    --color-pearl-strong: rgba(250, 250, 252, 0.06);
    --color-lavender-tint: rgba(167, 139, 250, 0.04);
    --color-mint-tint: rgba(52, 211, 153, 0.03);

    /* Accent colors - slightly refined */
    --color-accent-purple: #a78bfa;
    --color-accent-pink: #f472b6;
    --color-accent-blue: #60a5fa;
    --color-accent-cyan: #22d3ee;
    --color-accent-green: #34d399;
    --color-accent-orange: #fb923c;
    --color-accent-yellow: #fbbf24;
    --color-accent-red: #f87171;

    /* Text colors - refined contrast */
    --color-text-primary: #fafafa;
    --color-text-secondary: rgba(250, 250, 250, 0.70);
    --color-text-tertiary: rgba(250, 250, 250, 0.45);
    --color-text-quaternary: rgba(250, 250, 250, 0.28);

    /* Borders - hairline precision */
    --color-border-subtle: rgba(255, 255, 255, 0.05);
    --color-border-default: rgba(255, 255, 255, 0.08);
    --color-border-strong: rgba(255, 255, 255, 0.12);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-accent-purple), var(--color-accent-pink));
    --gradient-secondary: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-cyan));
    --gradient-pearl: linear-gradient(180deg, var(--color-pearl-strong) 0%, transparent 100%);

    /* Shadows - softer, more refined */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.24);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.32);
    --shadow-glow-purple: 0 0 48px rgba(167, 139, 250, 0.15);
    --shadow-glow-soft: 0 0 32px rgba(167, 139, 250, 0.08);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(255, 255, 255, 0.08);

    /* Spacing (8px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
    --font-mono: "SF Mono", ui-monospace, Menlo, Monaco, monospace;

    /* Font sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.8125rem;
    --text-base: 0.9375rem;
    --text-md: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;

    /* Line heights */
    --leading-tight: 1.1;
    --leading-snug: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;

    /* Transitions */
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 120ms;
    --duration-normal: 200ms;
    --duration-slow: 320ms;

    /* Layout */
    --max-width-content: 1120px;
    --max-width-narrow: 720px;
    --max-width-wide: 1320px;
    --navbar-height: 56px;
    --sidebar-width: 260px;
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--color-accent-purple);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* ============================================
   TYPOGRAPHY UTILITIES
   ============================================ */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-tertiary {
    color: var(--color-text-tertiary);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Headings */
h1, .h1 {
    font-size: clamp(2.5rem, 5vw, var(--text-5xl));
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: var(--leading-tight);
}

h2, .h2 {
    font-size: clamp(1.75rem, 4vw, var(--text-4xl));
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: var(--leading-snug);
}

h3, .h3 {
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: var(--leading-snug);
}

h4, .h4 {
    font-size: var(--text-xl);
    font-weight: 600;
    line-height: var(--leading-snug);
}

h5, .h5 {
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: var(--leading-snug);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-wide {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-sm {
    padding: var(--space-16) 0;
}

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Grid */
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border-subtle);
    z-index: 1000;
    transition: background var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.9);
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.navbar-logo svg {
    width: 28px;
    height: 28px;
}

.navbar-logo span {
    font-size: var(--text-md);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.navbar-center {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.navbar-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.navbar-links a:hover,
.navbar-links a.active {
    color: var(--color-text-primary);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Counter pill */
.counter-pill {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: help;
    position: relative;
}

.counter-pill::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.counter-number {
    font-weight: 600;
    color: var(--color-text-primary);
    font-variant-numeric: tabular-nums;
}

.counter-tooltip {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--duration-fast) var(--ease-out);
    pointer-events: none;
}

.counter-pill:hover .counter-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--color-text-primary);
    border-radius: 1px;
    transition: all var(--duration-normal) var(--ease-out);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu a {
    font-size: var(--text-2xl);
    font-weight: 500;
    color: var(--color-text-primary);
    transition: opacity var(--duration-fast);
}

.mobile-menu a:hover {
    opacity: 0.72;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: -0.01em;
    border-radius: var(--radius-full);
    border: none;
    transition: all var(--duration-normal) var(--ease-out);
    white-space: nowrap;
    position: relative;
}

.btn svg {
    width: 16px;
    height: 16px;
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-md);
}

.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-glass);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-default);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.btn-secondary:hover {
    background: var(--color-glass-light);
    border-color: var(--color-border-strong);
    transform: translateY(-1px);
}

.btn-tertiary {
    background: var(--color-glass);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-subtle);
}

.btn-tertiary:hover {
    background: var(--color-glass-light);
    border-color: var(--color-border-default);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: var(--space-2);
}

.btn-ghost:hover {
    color: var(--color-text-primary);
    background: var(--color-glass);
}

.btn-accent {
    background: var(--gradient-primary);
    color: white;
}

.btn-accent:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-glass);
    background-image: var(--gradient-pearl);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(180deg, rgba(255,255,255,0.06) 0%, transparent 50%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.card:hover {
    border-color: var(--color-border-default);
}

.card:hover::before {
    opacity: 1;
}

.card-elevated {
    background: var(--color-glass-light);
}

.card-interactive:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

.card-body {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================
   BADGES & PILLS
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
}

.badge-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.badge-success {
    background: rgba(52, 211, 153, 0.16);
    border-color: rgba(52, 211, 153, 0.24);
    color: var(--color-accent-green);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.16);
    border-color: rgba(251, 191, 36, 0.24);
    color: var(--color-accent-yellow);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--text-base);
    transition: border-color var(--duration-fast) var(--ease-out);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-accent-purple);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-quaternary);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ============================================
   ACCORDIONS
   ============================================ */
.accordion {
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
}

.accordion + .accordion {
    margin-top: var(--space-3);
}

.accordion-header {
    width: 100%;
    padding: var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    background: transparent;
    border: none;
    text-align: left;
    color: var(--color-text-primary);
    font-size: var(--text-md);
    font-weight: 500;
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out);
}

.accordion-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.accordion-icon {
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
    transition: transform var(--duration-normal) var(--ease-out);
    flex-shrink: 0;
}

.accordion[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-slow) var(--ease-out);
}

.accordion[aria-expanded="true"] .accordion-content {
    max-height: 500px;
}

.accordion-body {
    padding: 0 var(--space-5) var(--space-5);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-5);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: relative;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    max-width: 420px;
    width: 100%;
    transform: scale(0.95) translateY(20px);
    transition: all var(--duration-normal) var(--ease-out);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-glass);
    border: none;
    border-radius: 50%;
    color: var(--color-text-tertiary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
    background: var(--color-glass-light);
    color: var(--color-text-primary);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.modal-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.modal-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.modal-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.modal-body {
    margin-bottom: var(--space-6);
}

.modal-footer {
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border-subtle);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.modal-footer a {
    color: var(--color-accent-purple);
}

.modal-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    transform: translateX(120%);
    opacity: 0;
    transition: all var(--duration-normal) var(--ease-out);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.toast-success .toast-icon {
    color: var(--color-accent-green);
}

.toast-error .toast-icon {
    color: var(--color-accent-red);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--navbar-height) + var(--space-16)) var(--space-6) var(--space-16);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.3;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--color-accent-purple);
    top: -200px;
    right: 10%;
    opacity: 0.2;
}

.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: var(--color-accent-pink);
    bottom: 0;
    left: 5%;
    opacity: 0.15;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent-green);
    border-radius: 50%;
}

.hero-title {
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-10);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-top: var(--space-16);
    flex-wrap: wrap;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: var(--text-4xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-1);
}

.hero-stat-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-tertiary);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    padding: calc(var(--navbar-height) + var(--space-16)) 0 var(--space-12);
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: radial-gradient(ellipse at 50% 0%, rgba(167, 139, 250, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.page-header-content {
    position: relative;
    z-index: 1;
}

.page-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-purple);
    margin-bottom: var(--space-3);
}

.page-title {
    margin-bottom: var(--space-4);
}

.page-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: var(--leading-relaxed);
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent-purple);
    margin-bottom: var(--space-4);
    display: inline-block;
}

.section-title {
    margin-bottom: var(--space-5);
    letter-spacing: -0.03em;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 520px;
    margin: 0 auto;
    line-height: var(--leading-relaxed);
}

/* Section divider */
.section-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-subtle), transparent);
    margin: 0 auto;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--space-12) 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-subtle);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-logo svg {
    width: 24px;
    height: 24px;
}

.footer-logo span {
    font-size: var(--text-md);
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color var(--duration-fast);
}

.footer-links a:hover {
    color: var(--color-text-primary);
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* ============================================
   PORTAL SIDEBAR
   ============================================ */
.portal-layout {
    display: flex;
    min-height: 100vh;
    padding-top: var(--navbar-height);
}

.portal-sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-subtle);
    padding: var(--space-6);
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-section {
    margin-bottom: var(--space-8);
}

.sidebar-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-tertiary);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-2);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--duration-fast) var(--ease-out);
}

.sidebar-link:hover {
    background: var(--color-glass);
    color: var(--color-text-primary);
}

.sidebar-link.active {
    background: var(--color-glass-light);
    color: var(--color-text-primary);
}

.sidebar-link svg {
    width: 18px;
    height: 18px;
    opacity: 0.72;
}

.sidebar-link.active svg {
    opacity: 1;
}

.portal-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--space-8);
    min-height: calc(100vh - var(--navbar-height));
}

/* ============================================
   PORTAL COMPONENTS
   ============================================ */
.welcome-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1));
    pointer-events: none;
}

.welcome-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.welcome-subtitle {
    opacity: 0.88;
    margin-bottom: var(--space-6);
}

.progress-card {
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.progress-bar {
    height: 8px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow) var(--ease-out);
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.quick-action {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-out);
}

.quick-action:hover {
    background: var(--color-glass-light);
    border-color: var(--color-border-default);
    transform: translateY(-2px);
}

.quick-action-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-glass-elevated);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
}

.quick-action-text h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 2px;
}

.quick-action-text p {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* Lesson cards */
.lesson-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
}

.lesson-card:hover {
    background: var(--color-glass-light);
    border-color: var(--color-border-default);
}

.lesson-card.completed {
    border-color: rgba(52, 211, 153, 0.24);
}

.lesson-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-glass-elevated);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    flex-shrink: 0;
}

.lesson-card.completed .lesson-number {
    background: rgba(52, 211, 153, 0.16);
    color: var(--color-accent-green);
}

.lesson-content {
    flex: 1;
    min-width: 0;
}

.lesson-title {
    font-size: var(--text-md);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.lesson-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.lesson-duration {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Workflow cards */
.workflow-card {
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-fast) var(--ease-out);
}

.workflow-card:hover {
    border-color: var(--color-border-default);
}

.workflow-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.workflow-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.workflow-category {
    font-size: var(--text-xs);
    color: var(--color-accent-purple);
}

.workflow-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: var(--leading-relaxed);
}

.workflow-prompt {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    white-space: pre-wrap;
}

.workflow-actions {
    display: flex;
    gap: var(--space-2);
}

/* Template cards */
.template-card {
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    text-align: center;
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
}

.template-card:hover {
    border-color: var(--color-border-default);
    transform: translateY(-2px);
}

.template-icon {
    font-size: 2rem;
    margin-bottom: var(--space-3);
}

.template-name {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.template-desc {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* Checklist */
.checklist {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.checklist-item:hover {
    background: var(--color-glass-light);
}

.checklist-item.completed {
    opacity: 0.6;
}

.checklist-item.completed span {
    text-decoration: line-through;
}

.checklist-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--duration-fast) var(--ease-out);
}

.checklist-item.completed .checklist-checkbox {
    background: var(--color-accent-green);
    border-color: var(--color-accent-green);
}

.checklist-checkbox svg {
    width: 12px;
    height: 12px;
    color: white;
    opacity: 0;
}

.checklist-item.completed .checklist-checkbox svg {
    opacity: 1;
}

/* ============================================
   TABS
   ============================================ */
.tabs {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-1);
    background: var(--color-glass);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.tab {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.tab:hover {
    color: var(--color-text-primary);
}

.tab.active {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

/* ============================================
   SEARCH
   ============================================ */
.search-box {
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    padding-left: var(--space-10);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    transition: border-color var(--duration-fast) var(--ease-out);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent-purple);
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-tertiary);
    pointer-events: none;
}

/* ============================================
   FILTERS
   ============================================ */
.filter-bar {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.filter-btn:hover {
    border-color: var(--color-border-default);
    color: var(--color-text-primary);
}

.filter-btn.active {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
    color: var(--color-bg-primary);
}

/* ============================================
   SETTINGS
   ============================================ */
.settings-section {
    margin-bottom: var(--space-10);
}

.settings-section-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border-subtle);
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border-subtle);
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item-info h4 {
    font-size: var(--text-md);
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.settings-item-info p {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

/* Toggle switch */
.toggle {
    width: 44px;
    height: 24px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    padding: 2px;
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out);
}

.toggle.active {
    background: var(--color-accent-green);
}

.toggle-knob {
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform var(--duration-fast) var(--ease-out);
}

.toggle.active .toggle-knob {
    transform: translateX(20px);
}

/* ============================================
   FLOATING CTA (Mobile)
   ============================================ */
.floating-cta {
    display: none;
    position: fixed;
    bottom: var(--space-6);
    left: var(--space-4);
    right: var(--space-4);
    padding: var(--space-4);
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-md);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    z-index: 900;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--duration-normal) var(--ease-out);
}

.floating-cta.visible {
    transform: translateY(0);
    opacity: 1;
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .hero-glow {
        display: none;
    }
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .portal-sidebar {
        transform: translateX(-100%);
        transition: transform var(--duration-normal) var(--ease-out);
    }

    .portal-sidebar.open {
        transform: translateX(0);
    }

    .portal-main {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 52px;
    }

    .navbar {
        padding: 0 var(--space-4);
    }

    .navbar-center {
        display: none;
    }

    .counter-pill {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .section {
        padding: var(--space-16) 0;
    }

    .container,
    .container-narrow,
    .container-wide {
        padding: 0 var(--space-5);
    }

    .hero {
        padding: calc(var(--navbar-height) + var(--space-12)) var(--space-5) var(--space-12);
    }

    .hero-ctas {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }

    .hero-ctas .btn {
        width: 100%;
    }

    .hero-stats {
        gap: var(--space-8);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .floating-cta {
        display: block;
    }

    /* Hero glow reduced on mobile */
    .hero-glow {
        filter: blur(80px);
        opacity: 0.15;
    }

    /* Reduce backdrop blur on mobile */
    .card,
    .accordion,
    .modal {
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .portal-main {
        padding: var(--space-5);
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        bottom: calc(var(--space-6) + 60px);
    }

    .toast {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: var(--space-5);
    }

    .hero-stat-value {
        font-size: var(--text-3xl);
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   PREMIUM POLISH - LINKS & INTERACTIONS
   ============================================ */

/* Inline preview links */
.preview-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-accent-purple);
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.preview-link:hover {
    color: var(--color-accent-pink);
}

.preview-link::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width var(--duration-fast) var(--ease-out);
}

.preview-link:hover::after {
    width: 100%;
}

.preview-link svg {
    width: 12px;
    height: 12px;
    opacity: 0.7;
    transition: transform var(--duration-fast) var(--ease-out);
}

.preview-link:hover svg {
    transform: translateX(2px);
}

/* Preview modal/card */
.preview-card {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-top: var(--space-4);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all var(--duration-slow) var(--ease-out);
}

.preview-card.active {
    opacity: 1;
    max-height: 400px;
}

.preview-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border-subtle);
}

.preview-card-title {
    font-size: var(--text-sm);
    font-weight: 600;
}

.preview-card-close {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
}

.preview-card-close:hover {
    background: var(--color-glass);
    color: var(--color-text-primary);
}

.preview-card-body {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.preview-prompt {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-top: var(--space-3);
}

/* Premium text link with underline animation */
.link-animated {
    position: relative;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.link-animated::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent-purple);
    transition: width var(--duration-normal) var(--ease-out);
}

.link-animated:hover {
    color: var(--color-text-primary);
}

.link-animated:hover::after {
    width: 100%;
}

/* Feature icon polish */
.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-size: 1.5rem;
    position: relative;
    transition: transform var(--duration-normal) var(--ease-out);
}

.card-interactive:hover .feature-icon {
    transform: scale(1.05);
}

/* Stats refined */
.stat-value {
    font-size: var(--text-4xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-top: var(--space-2);
}

/* Testimonial refinement */
.testimonial-card {
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--space-4);
    left: var(--space-5);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-accent-purple);
    opacity: 0.1;
    pointer-events: none;
}

/* Before/After arrow */
.transform-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    color: var(--color-text-quaternary);
}

.transform-arrow svg {
    animation: float 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(4px); }
}

@media (prefers-reduced-motion: reduce) {
    .transform-arrow svg {
        animation: none;
    }
}

/* ============================================
   AUTH PAGES (Login/Signup)
   ============================================ */
.auth-page {
    min-height: calc(100vh - var(--navbar-height));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-10) var(--space-5);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-header h1 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.auth-header p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.auth-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
}

.auth-icon.success {
    background: rgba(52, 211, 153, 0.16);
    color: var(--color-accent-green);
}

.auth-icon svg {
    width: 32px;
    height: 32px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--text-base);
    transition: border-color var(--duration-fast) var(--ease-out);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent-purple);
}

.form-group input::placeholder {
    color: var(--color-text-quaternary);
}

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.auth-error {
    padding: var(--space-3) var(--space-4);
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.24);
    border-radius: var(--radius-md);
    color: var(--color-accent-red);
    font-size: var(--text-sm);
}

.auth-success {
    padding: var(--space-3) var(--space-4);
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.24);
    border-radius: var(--radius-md);
    color: var(--color-accent-green);
    font-size: var(--text-sm);
}

.auth-footer {
    margin-top: var(--space-6);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.auth-link {
    color: var(--color-accent-purple);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.auth-link:hover {
    color: var(--color-accent-pink);
}

.auth-divider {
    margin: 0 var(--space-3);
    color: var(--color-border-default);
}

.auth-content {
    text-align: center;
}

/* ============================================
   ACCOUNT DROPDOWN (Portal Header)
   ============================================ */
.account-dropdown {
    position: relative;
}

.account-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.account-trigger:hover {
    background: var(--color-glass-light);
    border-color: var(--color-border-default);
}

.account-avatar {
    width: 28px;
    height: 28px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
}

.account-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.account-email {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-primary);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.account-badge {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    border-radius: 4px;
}

.account-badge.course {
    background: rgba(167, 139, 250, 0.16);
    color: var(--color-accent-purple);
}

.account-badge.member {
    background: rgba(52, 211, 153, 0.16);
    color: var(--color-accent-green);
}

.account-chevron {
    width: 16px;
    height: 16px;
    color: var(--color-text-tertiary);
    transition: transform var(--duration-fast) var(--ease-out);
}

.account-dropdown.open .account-chevron {
    transform: rotate(180deg);
}

.account-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--duration-fast) var(--ease-out);
    z-index: 1000;
}

.account-dropdown.open .account-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.account-menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-3) var(--space-3);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
}

.account-menu-item:hover {
    background: var(--color-glass-light);
    color: var(--color-text-primary);
}

.account-menu-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.account-menu-divider {
    height: 1px;
    background: var(--color-border-subtle);
    margin: var(--space-2) 0;
}

.account-menu-item.logout {
    color: var(--color-accent-red);
}

.account-menu-item.logout:hover {
    background: rgba(248, 113, 113, 0.12);
    color: var(--color-accent-red);
}

/* Hide account info on smaller screens */
@media (max-width: 600px) {
    .account-info {
        display: none;
    }

    .account-trigger {
        padding: var(--space-2);
    }
}

/* ============================================
   CREATE ACCOUNT PROMPT (Success Page)
   ============================================ */
.create-account-prompt {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-subtle);
    text-align: center;
}

.create-account-prompt h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.create-account-prompt p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-5);
}

.create-account-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    text-align: left;
}

.create-account-benefit {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.create-account-benefit svg {
    width: 16px;
    height: 16px;
    color: var(--color-accent-green);
    flex-shrink: 0;
}

/* ============================================
   PREMIUM UI POLISH
   Subtle refinements for production-ready feel
   ============================================ */

/* ----------------------------------------
   Page Entrance Animation
   ---------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.portal-main {
    animation: fadeInUp 0.4s ease-out;
}

.hero-content {
    animation: fadeInUp 0.5s ease-out 0.1s both;
}

/* ----------------------------------------
   Enhanced Button Polish
   ---------------------------------------- */
.btn {
    transform: translateY(0);
    will-change: transform, box-shadow;
}

.btn:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary:active {
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Button loading state */
.btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btnSpin 0.6s linear infinite;
}

.btn-primary.loading::after {
    border-color: var(--color-bg-primary);
    border-right-color: transparent;
}

@keyframes btnSpin {
    to { transform: rotate(360deg); }
}

/* ----------------------------------------
   Card Hover Enhancements
   ---------------------------------------- */
.card {
    will-change: transform, box-shadow;
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:active {
    transform: translateY(-1px) scale(0.995);
}

/* ----------------------------------------
   Account Dropdown Premium Animation
   ---------------------------------------- */
.account-trigger {
    will-change: background, border-color;
}

.account-trigger:active {
    transform: scale(0.98);
}

.account-avatar {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
    transition: box-shadow var(--duration-fast) var(--ease-out);
}

.account-trigger:hover .account-avatar {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.account-menu {
    transform-origin: top right;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.account-dropdown.open .account-menu {
    animation: dropdownOpen 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes dropdownOpen {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.account-menu-item {
    position: relative;
}

.account-menu-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    border-radius: inherit;
    transition: background var(--duration-fast) var(--ease-out);
}

.account-menu-item:hover::before {
    background: var(--color-glass-light);
}

/* ----------------------------------------
   Sidebar Link Enhancements
   ---------------------------------------- */
.sidebar-link {
    position: relative;
    overflow: hidden;
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient-primary);
    border-radius: 0 2px 2px 0;
    transition: height var(--duration-normal) var(--ease-out);
}

.sidebar-link.active::before {
    height: 60%;
}

.sidebar-link svg {
    transition: transform var(--duration-fast) var(--ease-out), opacity var(--duration-fast);
}

.sidebar-link:hover svg {
    transform: scale(1.05);
}

/* ----------------------------------------
   Loading Skeleton
   ---------------------------------------- */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-glass) 25%,
        var(--color-glass-light) 50%,
        var(--color-glass) 75%
    );
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 14px;
    width: 100%;
    margin-bottom: 8px;
}

.skeleton-text:last-child {
    width: 60%;
    margin-bottom: 0;
}

.skeleton-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-button {
    height: 36px;
    width: 120px;
    border-radius: var(--radius-full);
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ----------------------------------------
   Empty State Polish
   ---------------------------------------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16) var(--space-6);
    text-align: center;
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-5);
    color: var(--color-text-quaternary);
    opacity: 0.6;
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text-secondary);
}

.empty-state-description {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    max-width: 300px;
    line-height: var(--leading-relaxed);
}

/* ----------------------------------------
   Progress Bar Enhancement
   ---------------------------------------- */
.progress-bar {
    background: var(--color-glass);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    background: var(--gradient-primary);
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: progressShine 2s ease-in-out infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    50%, 100% { transform: translateX(100%); }
}

/* ----------------------------------------
   Input Focus Enhancement
   ---------------------------------------- */
.form-input,
.form-textarea,
.form-select {
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-accent-purple);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

/* ----------------------------------------
   Link Hover Polish
   ---------------------------------------- */
a {
    transition: color var(--duration-fast) var(--ease-out);
}

/* ----------------------------------------
   Scrollbar Styling (Webkit)
   ---------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-glass-light);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-glass-elevated);
}

/* ----------------------------------------
   Selection Styling
   ---------------------------------------- */
::selection {
    background: rgba(167, 139, 250, 0.3);
    color: var(--color-text-primary);
}

/* ----------------------------------------
   Reduced Motion Support
   ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ----------------------------------------
   Toast Animation Enhancement
   ---------------------------------------- */
.toast {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.toast.show {
    animation: toastSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes toastSlideIn {
    from {
        transform: translateX(120%) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateX(0) scale(1);
        opacity: 1;
    }
}

/* ----------------------------------------
   Tooltip Polish
   ---------------------------------------- */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-fast) var(--ease-out);
    pointer-events: none;
    z-index: 1000;
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ----------------------------------------
   Module Card Completion State
   ---------------------------------------- */
.lesson-card.completed {
    position: relative;
}

.lesson-card.completed::after {
    content: '';
    position: absolute;
    top: 12px;
    right: 12px;
    width: 20px;
    height: 20px;
    background: var(--color-accent-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lesson-card.completed::before {
    content: '✓';
    position: absolute;
    top: 12px;
    right: 12px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 11px;
    font-weight: 700;
    z-index: 1;
}