/* ========================================
   Studoro Design System
   Modern, clean UI matching Flutter Client
   ======================================== */

/* ----------------------------------------
   1. CSS Custom Properties (Design Tokens)
   ---------------------------------------- */
:root {
    /* Primary Colors */
    --color-primary: #6366F1;
    --color-primary-light: #EEF2FF;
    --color-primary-dark: #4F46E5;
    --color-primary-hover: #5558E3;
    
    /* Background Colors */
    --color-background: #FAFAFC;
    --color-surface: #FFFFFF;
    --color-surface-elevated: #FFFFFF;
    
    /* Text Colors */
    --color-text: #1F2937;
    --color-text-secondary: #6B7280;
    --color-text-tertiary: #9CA3AF;
    --color-text-inverse: #FFFFFF;
    
    /* Status Colors */
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-error: #EF4444;
    --color-error-light: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;
    
    /* Border Colors */
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    --color-border-focus: var(--color-primary);
    
    /* Input Colors */
    --color-input-fill: #F9FAFB;
    --color-input-border: #E5E7EB;
    --color-input-focus-ring: rgba(99, 102, 241, 0.2);
    
    /* Shadow Colors */
    --color-shadow: rgba(0, 0, 0, 0.04);
    --color-shadow-md: rgba(0, 0, 0, 0.08);
    --color-shadow-lg: rgba(0, 0, 0, 0.12);
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    
    /* Border Radius Scale */
    --radius-sm: 0.5rem;     /* 8px */
    --radius-md: 0.75rem;    /* 12px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.25rem;    /* 20px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* Font Families */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 0.9375rem;  /* 15px */
    --text-md: 1rem;         /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.375rem;    /* 22px */
    --text-3xl: 1.5rem;      /* 24px */
    --text-4xl: 1.75rem;     /* 28px */
    --text-5xl: 2rem;        /* 32px */
    --text-6xl: 2.5rem;      /* 40px */
    --text-7xl: 3rem;        /* 48px */
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Line Heights */
    --leading-tight: 1.2;
    --leading-snug: 1.35;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-normal: 300ms ease-out;
    --transition-slow: 500ms ease-out;
    --transition-spring: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px var(--color-shadow);
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 4px 12px var(--color-shadow-md);
    --shadow-lg: 0 8px 24px var(--color-shadow-md);
    --shadow-xl: 0 12px 40px var(--color-shadow-lg);
    --shadow-focus: 0 0 0 4px var(--color-input-focus-ring);
    
    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1440px;
}

/* ----------------------------------------
   2. Base Styles & Reset
   ---------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* ----------------------------------------
   3. Typography
   ---------------------------------------- */
.text-display-lg {
    font-size: var(--text-7xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.text-display-md {
    font-size: var(--text-6xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.text-display-sm {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.text-heading-lg {
    font-size: var(--text-3xl);
    font-weight: var(--font-semibold);
    line-height: var(--leading-snug);
    color: var(--color-text);
}

.text-heading-md {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    line-height: var(--leading-snug);
    color: var(--color-text);
}

.text-heading-sm {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    line-height: var(--leading-snug);
    color: var(--color-text);
}

.text-body-lg {
    font-size: var(--text-md);
    font-weight: var(--font-normal);
    line-height: var(--leading-relaxed);
    color: var(--color-text);
}

.text-body {
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-text);
}

.text-body-sm {
    font-size: var(--text-sm);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-text-secondary);
}

.text-caption {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    line-height: var(--leading-normal);
    color: var(--color-text-tertiary);
}

.text-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: var(--leading-normal);
    color: var(--color-text);
}

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-inverse { color: var(--color-text-inverse); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

/* ----------------------------------------
   4. Layout & Container
   ---------------------------------------- */
.container-studoro {
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
    .container-studoro {
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container-studoro {
        padding: 0 var(--spacing-xl);
    }
}

.section-studoro {
    padding: var(--spacing-2xl) 0;
}

@media (min-width: 768px) {
    .section-studoro {
        padding: var(--spacing-3xl) 0;
    }
}

/* ----------------------------------------
   5. Buttons
   ---------------------------------------- */
.btn-studoro {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
}

.btn-studoro:focus-visible {
    box-shadow: var(--shadow-focus);
}

.btn-studoro:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    background-color: var(--color-primary-dark);
    transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-primary-light);
}

.btn-secondary:active:not(:disabled) {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

/* Ghost Button */
.btn-ghost {
    background-color: transparent;
    color: var(--color-text);
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-border-light);
}

/* Light Button */
.btn-light {
    background-color: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.btn-light:hover:not(:disabled) {
    background-color: var(--color-background);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
}

.btn-pill {
    border-radius: var(--radius-full);
}

.btn-block {
    width: 100%;
}

/* Link Button */
.btn-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0;
    background: none;
    border: none;
    color: var(--color-primary);
    font-family: var(--font-family);
    font-size: inherit;
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.btn-link:hover {
    color: var(--color-primary-dark);
}

/* ----------------------------------------
   6. Cards
   ---------------------------------------- */
.card-studoro {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card-studoro:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-bordered {
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xs);
}

.card-bordered:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

/* Glass Card */
.card-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
}

/* ----------------------------------------
   7. Form Elements
   ---------------------------------------- */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text);
}

.form-input {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--text-md);
    color: var(--color-text);
    background-color: var(--color-input-fill);
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

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

.form-input:hover:not(:disabled) {
    border-color: var(--color-text-tertiary);
}

.form-input:focus {
    border-color: var(--color-primary);
    background-color: var(--color-surface);
    box-shadow: var(--shadow-focus);
}

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-input.is-invalid {
    border-color: var(--color-error);
}

.form-input.is-invalid:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
}

.form-input.is-valid {
    border-color: var(--color-success);
}

/* Textarea */
.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Form Hint */
.form-hint {
    margin-top: var(--spacing-xs);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* Form Error */
.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--text-xs);
    color: var(--color-error);
}

/* ----------------------------------------
   8. Navigation
   ---------------------------------------- */
.navbar-studoro {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast);
}

.navbar-studoro.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.navbar-brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
    color: var(--color-text-inverse);
}

.navbar-brand-text {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-fast);
}

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

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

/* Mobile Menu Toggle */
.navbar-toggle {
    display: none;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
}

@media (max-width: 767px) {
    .navbar-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    
    .navbar-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--color-text);
        transition: all var(--transition-fast);
    }
    
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: var(--spacing-md);
        background-color: var(--color-surface);
        box-shadow: var(--shadow-lg);
        gap: var(--spacing-sm);
    }
    
    .navbar-nav.active {
        display: flex;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        border-radius: var(--radius-sm);
    }
    
    .nav-link:hover {
        background-color: var(--color-background);
    }
    
    .nav-link::after {
        display: none;
    }
}

/* ----------------------------------------
   9. Hero Section
   ---------------------------------------- */
.hero-studoro {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.hero-title {
    font-size: clamp(2rem, 5vw, var(--text-7xl));
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    letter-spacing: -0.02em;
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-lg);
}

.hero-title-accent {
    color: rgba(255, 255, 255, 0.7);
}

.hero-subtitle {
    font-size: clamp(var(--text-md), 2vw, var(--text-lg));
    color: rgba(255, 255, 255, 0.8);
    max-width: 45rem;
    margin: 0 auto var(--spacing-xl);
    line-height: var(--leading-relaxed);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 140%;
    min-width: 500px;
    line-height: 0;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 50px;
}

@media (min-width: 768px) {
    .hero-wave {
        width: 110%;
    }

    .hero-wave svg {
        height: auto;
    }
}

/* Hero Decorative Blobs */
.hero-blob {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    display: none;
}

@media (min-width: 768px) {
    .hero-blob {
        display: block;
    }

    .hero-blob-1 {
        top: 10%;
        left: 10%;
        width: 300px;
        height: 300px;
        background: rgba(255, 255, 255, 0.05);
        filter: blur(60px);
    }

    .hero-blob-2 {
        bottom: 20%;
        right: 15%;
        width: 400px;
        height: 400px;
        background: rgba(255, 255, 255, 0.03);
        filter: blur(80px);
    }
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 50rem;
    margin: var(--spacing-2xl) auto 0;
}

@media (min-width: 480px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.stat-value {
    font-size: clamp(var(--text-2xl), 5vw, var(--text-5xl));
    font-weight: var(--font-bold);
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* ----------------------------------------
   10. Features Section
   ---------------------------------------- */
.features-section {
    background-color: var(--color-background);
    position: relative;
    margin-top: -2px;
}

.section-header {
    text-align: center;
    max-width: 45rem;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
    font-weight: var(--font-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

.feature-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
    border-color: var(--color-primary-light);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--text-3xl);
    color: var(--color-text-inverse);
}

.feature-icon.primary { background-color: var(--color-primary); }
.feature-icon.success { background-color: var(--color-success); }
.feature-icon.info { background-color: var(--color-info); }
.feature-icon.warning { background-color: var(--color-warning); }

.feature-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ----------------------------------------
   11. About Section
   ---------------------------------------- */
.about-section {
    background-color: var(--color-surface);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.about-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.about-title {
    font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
    font-weight: var(--font-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

.about-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-xl);
}

.about-list {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.about-list-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.about-list-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--color-success);
}

.about-list-text {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

.about-stats {
    display: flex;
    gap: var(--spacing-md);
}

.about-stat {
    flex: 1;
    background-color: var(--color-primary-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.about-stat-value {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.about-stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.about-visual {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 1;
}

.about-visual-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-inverse);
    text-align: center;
}

.about-visual-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
}

.about-visual-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--spacing-sm);
}

.about-visual-subtitle {
    font-size: var(--text-lg);
    opacity: 0.8;
}

/* ----------------------------------------
   12. Contact Section
   ---------------------------------------- */
.contact-section {
    background-color: var(--color-background);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.contact-form-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
    .contact-form-card {
        padding: var(--spacing-2xl);
    }
}

.contact-form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .contact-form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info-stack {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-info-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.contact-info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
    color: var(--color-text-inverse);
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-md);
}

.contact-info-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.contact-info-text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
}

/* ----------------------------------------
   13. Footer
   ---------------------------------------- */
.footer-studoro {
    background-color: #111827;
    color: var(--color-text-inverse);
    padding: var(--spacing-2xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
}

.footer-brand-text {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
}

.footer-description {
    font-size: var(--text-base);
    color: rgba(255, 255, 255, 0.6);
    max-width: 25rem;
    margin-bottom: var(--spacing-lg);
    line-height: var(--leading-relaxed);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-inverse);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-social-link:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-nav-title {
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-lg);
}

.footer-nav-list {
    list-style: none;
}

.footer-nav-link {
    display: block;
    padding: var(--spacing-xs) 0;
    font-size: var(--text-base);
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-nav-link:hover {
    color: var(--color-text-inverse);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
}

/* ----------------------------------------
   14. Utility Classes
   ---------------------------------------- */

/* Flexbox */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Spacing */
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-sm { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-md { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-lg { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-xl { margin-top: var(--spacing-xl); margin-bottom: var(--spacing-xl); }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

/* Text Alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Visibility */
.hidden { display: none; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* Responsive */
@media (min-width: 640px) {
    .sm\:hidden { display: none; }
    .sm\:flex { display: flex; }
    .sm\:block { display: block; }
}

@media (min-width: 768px) {
    .md\:hidden { display: none; }
    .md\:flex { display: flex; }
    .md\:block { display: block; }
}

@media (min-width: 1024px) {
    .lg\:hidden { display: none; }
    .lg\:flex { display: flex; }
    .lg\:block { display: block; }
}

/* ----------------------------------------
   15. Animations
   ---------------------------------------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes blob {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--transition-normal) ease-out forwards;
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-normal) ease-out forwards;
}

.animate-fade-in-down {
    animation: fadeInDown var(--transition-normal) ease-out forwards;
}

.animate-scale-in {
    animation: scaleIn var(--transition-normal) ease-out forwards;
}

.animate-slide-in-left {
    animation: slideInLeft var(--transition-normal) ease-out forwards;
}

.animate-slide-in-right {
    animation: slideInRight var(--transition-normal) ease-out forwards;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-blob {
    animation: blob 7s infinite;
}

/* Animation Delays */
.animation-delay-100 { animation-delay: 100ms; }
.animation-delay-200 { animation-delay: 200ms; }
.animation-delay-300 { animation-delay: 300ms; }
.animation-delay-400 { animation-delay: 400ms; }
.animation-delay-500 { animation-delay: 500ms; }
.animation-delay-1000 { animation-delay: 1000ms; }
.animation-delay-2000 { animation-delay: 2000ms; }
.animation-delay-4000 { animation-delay: 4000ms; }

/* ----------------------------------------
   16. Loading States
   ---------------------------------------- */
.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-border-light) 25%,
        var(--color-border) 50%,
        var(--color-border-light) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

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

/* ----------------------------------------
   17. Accessibility
   ---------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* ----------------------------------------
   18. Print Styles
   ---------------------------------------- */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
    }
}

/* ----------------------------------------
   19. Legal/Info Pages (FAQ, Privacy, Terms)
   ---------------------------------------- */

/* Legal Hero Section */
.legal-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.legal-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.legal-hero-title {
    font-size: clamp(var(--text-3xl), 5vw, var(--text-6xl));
    font-weight: var(--font-bold);
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.legal-hero-subtitle {
    font-size: clamp(var(--text-base), 2vw, var(--text-lg));
    color: rgba(255, 255, 255, 0.85);
    max-width: 40rem;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.legal-update-date {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.65);
    margin-top: var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Legal Content Section */
.legal-content {
    background-color: var(--color-background);
}

.legal-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 1024px) {
    .legal-container {
        grid-template-columns: 280px 1fr;
    }
}

/* Table of Contents */
.legal-toc {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    height: fit-content;
    position: sticky;
    top: calc(var(--spacing-lg) + 70px);
}

@media (max-width: 1023px) {
    .legal-toc {
        position: relative;
        top: 0;
    }
}

.legal-toc-title {
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.legal-toc-list {
    list-style: none;
}

.legal-toc-list li {
    margin-bottom: var(--spacing-xs);
}

.legal-toc-list a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.legal-toc-list a:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

/* Legal Main Content */
.legal-main {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

@media (min-width: 768px) {
    .legal-main {
        padding: var(--spacing-xl);
    }
}

.legal-section {
    margin-bottom: var(--spacing-2xl);
    scroll-margin-top: 100px;
}

.legal-section:last-child {
    margin-bottom: 0;
}

.legal-section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary-light);
}

.legal-section-title i {
    color: var(--color-primary);
    font-size: var(--text-2xl);
}

.legal-subsection-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.legal-section p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-md);
}

.legal-list {
    list-style: none;
    margin: var(--spacing-md) 0;
    padding-left: 0;
}

.legal-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.legal-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.legal-list li strong {
    color: var(--color-text);
}

/* Info and Contact Boxes */
.legal-info-box {
    background-color: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.legal-info-box p {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.legal-info-box p:last-child {
    margin-bottom: 0;
}

.legal-contact-box {
    background-color: var(--color-background);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.legal-contact-box p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.legal-contact-box p:first-child {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-md);
}

.legal-contact-box p:last-child {
    margin-bottom: 0;
}

.legal-contact-box a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.legal-contact-box a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.legal-back-top {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ----------------------------------------
   20. FAQ Styles
   ---------------------------------------- */

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-category {
    margin-bottom: var(--spacing-2xl);
}

.faq-category:last-child {
    margin-bottom: 0;
}

.faq-category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary-light);
}

.faq-category-title i {
    color: var(--color-primary);
    font-size: var(--text-2xl);
}

.faq-item {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}

.faq-item.open {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--color-text);
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-background);
}

.faq-item.open .faq-question {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    color: var(--color-text-tertiary);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

.faq-answer p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* FAQ CTA Section */
.faq-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-surface) 100%);
    border-radius: var(--radius-xl);
}

.faq-cta-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.faq-cta-text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Mobile Responsive Adjustments */
@media (max-width: 767px) {
    .legal-hero {
        padding: var(--spacing-2xl) 0 var(--spacing-xl);
    }
    
    .legal-main {
        padding: var(--spacing-md);
    }
    
    .legal-section-title {
        font-size: var(--text-lg);
        flex-wrap: wrap;
    }
    
    .legal-section-title i {
        font-size: var(--text-xl);
    }
    
    .legal-subsection-title {
        font-size: var(--text-md);
    }
    
    .legal-toc {
        padding: var(--spacing-md);
    }
    
    .legal-info-box,
    .legal-contact-box {
        padding: var(--spacing-md);
    }
    
    .faq-question {
        padding: var(--spacing-md);
        font-size: var(--text-sm);
    }
    
    .faq-item.open .faq-answer {
        padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
    }
    
    .faq-answer p {
        font-size: var(--text-sm);
    }
    
    .faq-category-title {
        font-size: var(--text-lg);
    }
    
    .faq-category-title i {
        font-size: var(--text-xl);
    }
    
    .faq-cta {
        padding: var(--spacing-lg);
    }
    
    .faq-cta-title {
        font-size: var(--text-xl);
    }
}

@media (max-width: 480px) {
    .legal-hero-title {
        font-size: var(--text-2xl);
    }
    
    .legal-hero-subtitle {
        font-size: var(--text-sm);
    }
    
    .legal-list li {
        padding-left: var(--spacing-md);
        font-size: var(--text-sm);
    }
    
    .legal-contact-box p {
        flex-wrap: wrap;
    }
}