/* ==========================================================================
   TRITON - Main Stylesheet
   AI Language Coach Platform
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Theme
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --secondary-dark: #db2777;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --gray-950: #030712;
    
    /* Theme Variables */
    --bg-primary: var(--gray-950);
    --bg-secondary: var(--gray-900);
    --bg-tertiary: var(--gray-800);
    --bg-card: rgba(31, 41, 55, 0.8);
    --text-primary: var(--white);
    --text-secondary: var(--gray-300);
    --text-muted: var(--gray-500);
    --border-color: var(--gray-700);
    --border-light: var(--gray-800);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-950) 100%);
    --gradient-glow: radial-gradient(circle at center, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Poppins', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-toast: 400;
    --z-loader: 500;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: var(--gray-50);
    --bg-secondary: var(--white);
    --bg-tertiary: var(--gray-100);
    --bg-card: rgba(255, 255, 255, 0.9);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-400);
    --border-color: var(--gray-200);
    --border-light: var(--gray-100);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

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

ul, ol {
    list-style: none;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.hidden {
    display: none !important;
}

/* --------------------------------------------------------------------------
   Loader
   -------------------------------------------------------------------------- */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loader);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

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

.loader-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    animation: pulse 2s ease-in-out infinite;
}

.logo-svg {
    width: 100%;
    height: 100%;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--space-md);
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

[data-theme="light"] .header {
    background: rgba(255, 255, 255, 0.8);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--success);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

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

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background: var(--border-color);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    overflow: hidden;
}

/* Trust Section */
.trust {
    padding: var(--space-2xl) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.trust-card {
    text-align: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
}

.trust-card h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: var(--space-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* How it works */
.how-it-works {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

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

.steps-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
}

.step-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--white);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.step-card h4 {
    margin-bottom: var(--space-sm);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0.5;
}

.floating-icons {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.float-icon {
    position: absolute;
    font-size: 2rem;
    opacity: 0.3;
    left: var(--x);
    top: var(--y);
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.hero-badge i {
    color: var(--primary);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.feature i {
    color: var(--success);
}

/* Avatar Preview Card */
.avatar-preview-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-xl);
}

.avatar-frame {
    width: 280px;
    height: 280px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    background: var(--gradient-primary);
    padding: 3px;
    position: relative;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    border-radius: calc(var(--radius-xl) - 3px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.avatar-icon {
    font-size: 5rem;
    color: var(--gray-600);
}

.avatar-waves {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 4px;
}

.avatar-waves span {
    width: 6px;
    background: var(--primary);
    border-radius: var(--radius-full);
    animation: wave 1.2s ease-in-out infinite;
}

.avatar-waves span:nth-child(1) { height: 20px; animation-delay: 0s; }
.avatar-waves span:nth-child(2) { height: 35px; animation-delay: 0.1s; }
.avatar-waves span:nth-child(3) { height: 50px; animation-delay: 0.2s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(1.5); }
}

.avatar-status {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
}

.live-badge {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--danger);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--white);
    border-radius: 50%;
    animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.avatar-languages {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    font-size: 2rem;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: #0d9668;
}

.btn-success:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.05rem;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--border-color);
}

.btn-text {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.2;
}

.btn-text small {
    font-weight: 400;
    opacity: 0.8;
    font-size: 0.75rem;
}

/* --------------------------------------------------------------------------
   Setup Section
   -------------------------------------------------------------------------- */
.setup-section {
    min-height: 100vh;
    padding: calc(70px + var(--space-3xl)) 0 var(--space-3xl);
    display: none;
}

.setup-section.active {
    display: block;
}

.setup-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    backdrop-filter: blur(20px);
    max-width: 800px;
    margin: 0 auto;
}

.setup-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.setup-header h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

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

/* Progress Bar */
.progress-bar {
    margin-bottom: var(--space-2xl);
}

.progress-track {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 25%;
    transition: width var(--transition-normal);
}

.progress-steps {
    display: flex;
    justify-content: space-between;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.step-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.progress-step.active .step-number,
.progress-step.completed .step-number {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.progress-step.completed .step-number::after {
    content: '✓';
}

.step-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.progress-step.active .step-label {
    color: var(--text-primary);
}

/* Step Panels */
.steps-container {
    position: relative;
}

.step-panel {
    display: none;
    text-align: center;
    animation: fadeIn var(--transition-normal);
}

.step-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    font-size: 2rem;
    color: var(--white);
}

.step-panel h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.step-panel > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* Input Group */
.input-group {
    position: relative;
    max-width: 400px;
    margin: 0 auto var(--space-xl);
}

.text-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-right: 50px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1.1rem;
    text-align: center;
    transition: all var(--transition-fast);
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.input-icon {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* Options Grid */
.options-grid {
    display: grid;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.language-options {
    grid-template-columns: repeat(3, 1fr);
}

.gender-options {
    grid-template-columns: repeat(3, 1fr);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

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

.option-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
    text-align: center;
}

.option-card:hover {
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.option-card.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.option-emoji {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
}

.option-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    color: var(--primary);
}

.option-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.option-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.option-card.large {
    padding: var(--space-xl);
    text-align: left;
    align-items: flex-start;
}

.option-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    width: 100%;
}

.option-header .option-icon {
    font-size: 1.5rem;
    margin-bottom: 0;
}

.option-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.option-features {
    width: 100%;
}

.option-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.option-features li i {
    color: var(--success);
    font-size: 0.75rem;
}

/* Avatar Selection */
.avatar-selection {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    display: none;
}

.avatar-selection.visible {
    display: block;
}

.avatar-selection h4 {
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.avatar-filters {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.filter-btn {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.avatars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-md);
    max-height: 300px;
    overflow-y: auto;
    padding: var(--space-sm);
}

.avatar-option {
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    padding: var(--space-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.avatar-option:hover {
    border-color: var(--primary-light);
    transform: scale(1.05);
}

.avatar-option.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.avatar-option img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.avatar-option .avatar-placeholder-icon {
    font-size: 2.5rem;
    color: var(--text-muted);
}

/* Step Buttons */
.step-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-2xl) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-logo {
    width: 32px;
    height: 32px;
}

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

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .avatar-frame {
        width: 200px;
        height: 200px;
    }

    .steps-showcase,
    .trust-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .language-options,
    .gender-options {
        grid-template-columns: 1fr;
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .class-type-options {
        grid-template-columns: 1fr;
    }
    
    .progress-steps {
        flex-wrap: wrap;
        gap: var(--space-md);
    }
    
    .step-label {
        display: none;
    }
    
    .setup-card {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .header-content {
        height: 60px;
    }
    
    .status-indicator span:not(.status-dot) {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .setup-header h2 {
        font-size: 1.5rem;
    }
    
    .step-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}