/**
 * style.css - 왕초보 영어회화 메인 스타일시트
 * 위치: /assets/css/style.css
 *
 * Cosmic 컬러 스킴 + LeetCode 스타일 UI
 * ANTIGRAVITY 효과: Particle Orbit, Blueshift
 */

/* ==========================================
   CSS VARIABLES
   ========================================== */
:root {
    /* LeetCode Inspired + Cosmic Color Scheme */
    --primary: #FF6F00;
    --primary-light: #FF8F00;
    --primary-dark: #E65100;
    --secondary: #764ba2;
    --accent: #f093fb;
    --accent-cyan: #06d6a0;
    --accent-pink: #ef476f;
    --accent-yellow: #ffd93d;
    --accent-blue: #4dabf7;

    /* Background Colors (Cosmic Dark) */
    --bg-dark: #0f0f23;
    --bg-darker: #0a0a1a;
    --bg-card: #1a1a3e;
    --bg-card-hover: #252550;
    --bg-gradient: linear-gradient(135deg, #0f0f23 0%, #1a1a3e 50%, #2a1a4a 100%);

    /* Text Colors */
    --text-white: #ffffff;
    --text-light: #e0e0f0;
    --text-gray: #9ca3af;
    --text-muted: #6b7280;

    /* Status Colors */
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* VAK Type Colors */
    --visual-color: #4dabf7;
    --auditory-color: #f59e0b;
    --kinesthetic-color: #22c55e;

    /* Glow Effects */
    --glow-primary: rgba(255, 111, 0, 0.5);
    --glow-secondary: rgba(118, 75, 162, 0.5);
    --glow-accent: rgba(240, 147, 251, 0.5);

    /* Typography */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Orbitron', 'Poppins', sans-serif;
    --font-game: 'Poppins', sans-serif;

    /* Spacing */
    --space-2xs: 2px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--glow-primary);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index layers */
    --z-dropdown: 100;
    --z-header: 200;
    --z-modal: 300;
    --z-toast: 400;
    --z-loading: 500;

    /* Aliases for component styles */
    --color-primary: var(--primary);
    --color-primary-light: var(--primary-light);
    --color-secondary: var(--secondary);
    --color-accent: var(--accent);
    --color-success: var(--success);
    --color-warning: var(--warning);
    --color-error: var(--danger);
    --color-info: var(--info);
    --color-text: var(--text-white);
    --color-text-secondary: var(--text-gray);
    --color-text-muted: var(--text-muted);
    --color-background: var(--bg-dark);
    --color-surface: var(--bg-card);
    --color-surface-elevated: var(--bg-card-hover);
    --color-border: rgba(255, 111, 0, 0.2);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-light);
    background: var(--bg-dark);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-white);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.display-title {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: 0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 5s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ==========================================
   LOADING SCREEN
   ========================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-darker);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loading-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.loading-logo .logo-icon {
    font-size: 3rem;
    animation: pulse 1s infinite;
}

.loading-logo .logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 auto var(--space-md);
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    animation: loading-progress 1.5s ease-in-out infinite;
}

.loading-text {
    color: var(--text-gray);
    font-size: 0.875rem;
}

@keyframes loading-progress {
    0% { width: 0%; transform: translateX(0); }
    50% { width: 70%; }
    100% { width: 100%; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

.container-sm { max-width: 800px; }
.container-lg { max-width: 1400px; }

/* ==========================================
   HEADER
   ========================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-header);
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    height: 60px;
    background: rgba(10, 10, 26, 0.98);
    box-shadow: var(--shadow-lg);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.logo .logo-icon {
    font-size: 2rem;
}

.logo .logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo .logo-main {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary);
}

.logo .logo-sub {
    font-size: 0.75rem;
    color: var(--text-gray);
    font-weight: 500;
}

/* Main Navigation */
.main-nav {
    display: flex;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-sm);
}

.nav-list > li > a {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-gray);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.nav-list > li > a:hover,
.nav-list > li > a.active {
    color: var(--text-white);
    background: var(--bg-card);
}

.nav-list > li > a.nav-cta {
    background: var(--gradient-primary);
    color: white;
}

.nav-list > li > a.nav-cta:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.nav-icon {
    font-size: 1rem;
}

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    list-style: none;
    box-shadow: var(--shadow-lg);
}

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

.dropdown-menu li a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-gray);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
    color: var(--text-white);
    background: var(--bg-card-hover);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--text-white);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.user-btn:hover {
    border-color: var(--primary);
    background: var(--bg-card);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    list-style: none;
    box-shadow: var(--shadow-lg);
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown li a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-gray);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.user-dropdown li a:hover {
    color: var(--text-white);
    background: var(--bg-card-hover);
}

.user-dropdown .divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-sm) 0;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* ==========================================
   MOBILE NAVIGATION
   ========================================== */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background: var(--bg-darker);
    z-index: calc(var(--z-header) + 10);
    transition: right var(--transition-normal);
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav-header .logo-icon {
    font-size: 2rem;
}

.mobile-nav-close {
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: none;
    border-radius: 50%;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
    background: var(--primary);
}

.mobile-nav-list {
    list-style: none;
    padding: var(--space-md);
}

.mobile-nav-list li {
    margin-bottom: var(--space-xs);
}

.mobile-nav-list a {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    color: var(--text-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-list a:hover,
.mobile-nav-list a.highlight {
    color: var(--text-white);
    background: var(--bg-card);
}

.mobile-nav-list a.highlight {
    background: var(--gradient-primary);
}

.mobile-nav-auth {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-header) + 5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

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

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-gray);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-white);
    background: var(--bg-card);
}

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

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ==========================================
   CARDS
   ========================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

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

.card-header {
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.card-body {
    color: var(--text-gray);
}

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

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--text-white);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 111, 0, 0.1);
}

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

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

/* ==========================================
   SECTION STYLES
   ========================================== */
.section {
    padding: var(--space-3xl) 0;
}

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

.section-header.text-left {
    text-align: left;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--space-sm);
}

.section-desc {
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   SLIDER / CAROUSEL
   ========================================== */
.slider {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease;
}

.slider-slide {
    min-width: 100%;
    flex-shrink: 0;
}

.slider-indicators {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-sm);
    z-index: 10;
}

.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.slider-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(15, 15, 35, 0.8);
    border: 1px solid var(--color-border);
    color: var(--text-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all var(--transition-normal);
}

.slider-arrow:hover {
    background: var(--primary);
}

.slider-arrow.prev { left: var(--space-md); }
.slider-arrow.next { right: var(--space-md); }

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid var(--color-border);
}

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

.footer-logo .logo-icon {
    font-size: 1.5rem;
}

.footer-logo span:last-child {
    font-weight: 700;
    color: var(--text-white);
}

.footer-desc {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: 50%;
    color: var(--text-gray);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-gray);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer-company {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.company-info {
    text-align: center;
}

.company-info p {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-bottom: var(--space-xs);
}

.company-info strong {
    color: var(--text-gray);
}

.footer-bottom {
    padding: var(--space-lg) 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-legal {
    margin-top: var(--space-sm);
}

.footer-legal a {
    color: var(--text-muted);
}

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

.footer-legal span {
    margin: 0 var(--space-sm);
    color: var(--text-muted);
}

/* ==========================================
   TOAST NOTIFICATIONS
   ========================================== */
.toast-container {
    position: fixed;
    top: calc(var(--header-height) + var(--space-md));
    right: var(--space-md);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }
.toast.info { border-color: var(--info); }

.toast-icon {
    font-size: 1.25rem;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--space-2xs);
}

.toast-message {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-white);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; transform: translateX(100%); }
}

/* ==========================================
   MAIN CONTENT
   ========================================== */
.site-main {
    min-height: calc(100vh - var(--header-height) - 300px);
    padding-top: var(--header-height);
}

/* ==========================================
   VAK TYPE BADGES
   ========================================== */
.vak-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.vak-badge.visual {
    background: rgba(77, 171, 247, 0.2);
    color: var(--visual-color);
    border: 1px solid var(--visual-color);
}

.vak-badge.auditory {
    background: rgba(245, 158, 11, 0.2);
    color: var(--auditory-color);
    border: 1px solid var(--auditory-color);
}

.vak-badge.kinesthetic {
    background: rgba(34, 197, 94, 0.2);
    color: var(--kinesthetic-color);
    border: 1px solid var(--kinesthetic-color);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mt-5 { margin-top: var(--space-2xl); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-2xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

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

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }