/*
===============================================
Mallify.vn - Gamified Language Learning Platform
Playful, Colorful, Fun Design System
===============================================
*/

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: #2d3436;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 25%, #ffecd2 50%, #a8edea 75%, #fed6e3 100%);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
    overflow-x: hidden;
}

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

/* ===== CSS VARIABLES ===== */
:root {
    /* Primary Colors - Bright & Vibrant */
    --color-primary: #4CAF50;
    --color-primary-light: #81C784;
    --color-primary-dark: #388E3C;
    --color-secondary: #FFC107;
    --color-secondary-light: #FFD54F;
    --color-secondary-dark: #FFA000;

    /* Accent Colors - Playful Palette */
    --color-red: #FF5252;
    --color-pink: #FF4081;
    --color-purple: #E040FB;
    --color-blue: #2196F3;
    --color-cyan: #00BCD4;
    --color-orange: #FF6F00;

    /* Neutrals */
    --color-white: #FFFFFF;
    --color-light: #F8F9FA;
    --color-grey: #636e72;
    --color-dark: #2d3436;
    --color-black: #000000;

    /* Shadows - Colorful Glows */
    --shadow-sm: 0 2px 8px rgba(76, 175, 80, 0.15);
    --shadow-md: 0 4px 16px rgba(76, 175, 80, 0.2);
    --shadow-lg: 0 8px 32px rgba(76, 175, 80, 0.25);
    --shadow-xl: 0 16px 48px rgba(76, 175, 80, 0.3);
    --shadow-colorful: 0 8px 32px rgba(76, 175, 80, 0.3), 0 4px 16px rgba(255, 193, 7, 0.2);
    --shadow-game: 0 12px 40px rgba(255, 64, 129, 0.3), 0 6px 20px rgba(33, 150, 243, 0.2);

    /* Border Radius - Very Rounded Game Style */
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 32px;
    --radius-xl: 48px;
    --radius-full: 9999px;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-2xl: 8rem;

    /* Typography */
    --font-heading: 'Nunito', 'Poppins', sans-serif;
    --font-body: 'Poppins', sans-serif;

    /* Transitions - Bouncy */
    --transition-fast: 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-base: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-slow: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Container */
    --container-max: 1200px;
    --container-padding: 2rem;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShine 3s ease-in-out infinite;
}

@keyframes textShine {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60%;
    height: 6px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-pink));
    border-radius: var(--radius-full);
}

h3 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--color-blue);
}

h4 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    color: var(--color-purple);
}

p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: var(--color-grey);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
    transform: scale(1.05);
}

/* ===== CONTAINER & LAYOUT ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

section, .section {
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

section::before, .section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 193, 7, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== BUTTONS - PLAYFUL & BOUNCY ===== */
.btn, .btn-primary, .btn-secondary, .btn-outline, .btn-large, .btn-add-cart, .btn-view {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn::before, .btn-primary::before, .btn-secondary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before, .btn-primary:hover::before, .btn-secondary:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover, .btn-primary:hover, .btn-secondary:hover, .btn-outline:hover, .btn-add-cart:hover, .btn-view:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-colorful);
}

.btn:active, .btn-primary:active, .btn-secondary:active {
    transform: translateY(-2px) scale(1.02);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    border: 2px solid var(--color-primary);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-orange) 100%);
    color: var(--color-dark);
    border: 2px solid transparent;
}

.btn-outline {
    background: var(--color-white);
    color: var(--color-primary);
    border: 3px solid var(--color-primary);
}

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

.btn-large {
    padding: 1.5rem 3rem;
    font-size: 1.25rem;
}

.btn-add-cart, .btn-view {
    width: auto;
    padding: 0.75rem 1.5rem;
}

/* ===== NAVIGATION - PLAYFUL HEADER ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    border-bottom: 4px solid var(--color-primary);
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.logo h1, .navbar-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform var(--transition-base);
}

.logo h1:hover, .navbar-logo:hover {
    transform: scale(1.1) rotate(-5deg);
}

.nav-menu, .navbar-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a, .navbar-link {
    font-weight: 600;
    color: var(--color-dark);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
}

.nav-menu a::before, .navbar-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

.nav-menu a:hover, .navbar-link:hover {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.nav-menu a:hover::before, .navbar-link:hover::before {
    width: 80%;
}

.nav-menu a.active, .navbar-link.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
}

.hamburger, .navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span, .navbar-toggle span {
    width: 30px;
    height: 3px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

/* ===== HERO SECTION - GAME STYLE ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, rgba(255, 193, 7, 0.1) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path fill="%234CAF50" fill-opacity="0.1" d="M0,50 Q300,0 600,50 T1200,50 L1200,0 L0,0 Z"></path></svg>');
    background-size: cover;
    animation: wave 10s ease-in-out infinite;
}

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

.hero .container, .hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: slideInLeft 0.8s ease-out;
    padding: 0 var(--spacing-lg);
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-badge {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-game);
    animation: bounce 2s ease-in-out infinite;
}

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

.hero-content h2, .hero-title {
    margin-bottom: 1.5rem;
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    color: var(--color-white);
}

.hero-content p, .hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

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

/* ===== PAGE HEADER ===== */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    padding: 8rem 0 4rem;
    text-align: center;
    color: var(--color-white);
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--color-white);
    background: none;
    -webkit-text-fill-color: var(--color-white);
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    color: var(--color-white);
    position: relative;
    z-index: 1;
}

/* ===== SECTION TITLES ===== */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: 1rem;
    display: inline-block;
}

.divider {
    width: 80px;
    height: 6px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* ===== LANGUAGE SELECTION - CHARACTER CARDS ===== */
.language-selection {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
    position: relative;
}

.language-selection::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, transparent 0%, rgba(76, 175, 80, 0.1) 100%);
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.language-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 4px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.language-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, var(--color-primary), var(--color-secondary), var(--color-blue));
    opacity: 0;
    transition: opacity var(--transition-base);
    animation: rotate 3s linear infinite;
}

.language-card:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-colorful);
}

.language-card:hover::before {
    opacity: 0.1;
}

.language-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}

.language-card:hover .language-icon {
    transform: rotate(360deg) scale(1.1);
}

.language-card h3 {
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    position: relative;
    z-index: 1;
}

.language-card p {
    color: var(--color-grey);
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

.language-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--color-secondary);
    color: var(--color-dark);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 2;
}

/* ===== GAME MODES - MINI GAMES GRID ===== */
.game-modes {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.game-modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.game-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--color-red), var(--color-pink), var(--color-purple), var(--color-blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.game-card:hover::before {
    transform: scaleX(1);
}

.game-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-blue);
    box-shadow: var(--shadow-game);
}

.game-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.game-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-blue), var(--color-cyan));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    box-shadow: var(--shadow-md);
}

.game-title {
    flex: 1;
}

.game-title h3 {
    margin-bottom: 0.25rem;
}

.game-difficulty {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-secondary);
    color: var(--color-dark);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.game-description {
    margin-bottom: 1.5rem;
}

.game-stats {
    display: flex;
    gap: 1.5rem;
    padding-top: 1rem;
    border-top: 2px dashed var(--color-light);
}

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

.game-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.game-stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-grey);
    text-transform: uppercase;
}

/* ===== LEADERBOARD - RANKING TABLE ===== */
.leaderboard {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
}

.leaderboard-container {
    max-width: 900px;
    margin: 3rem auto;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
}

.leaderboard-header {
    text-align: center;
    margin-bottom: 2rem;
}

.leaderboard-header h2 {
    color: var(--color-white);
}

.leaderboard-header h2::after {
    background: var(--color-secondary);
}

.leaderboard-table {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 80px 1fr 120px 120px;
    gap: 1rem;
    padding: 1.5rem;
    align-items: center;
    transition: all var(--transition-base);
    border-bottom: 2px solid var(--color-light);
}

.leaderboard-row:last-child {
    border-bottom: none;
}

.leaderboard-row:hover {
    background: linear-gradient(90deg, rgba(76, 175, 80, 0.1), transparent);
    transform: translateX(5px);
}

.leaderboard-rank {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-grey);
    text-align: center;
}

.leaderboard-row:nth-child(1) .leaderboard-rank {
    color: #FFD700;
    font-size: 2.5rem;
}

.leaderboard-row:nth-child(2) .leaderboard-rank {
    color: #C0C0C0;
    font-size: 2.25rem;
}

.leaderboard-row:nth-child(3) .leaderboard-rank {
    color: #CD7F32;
    font-size: 2.1rem;
}

.leaderboard-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.leaderboard-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: 900;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
}

.leaderboard-name {
    font-weight: 700;
    color: var(--color-dark);
}

.leaderboard-score {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-align: center;
}

.leaderboard-level {
    text-align: center;
}

.level-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--color-purple), var(--color-pink));
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

/* ===== ACHIEVEMENTS WALL - BADGE COLLECTION ===== */
.achievements-wall {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.achievement-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 193, 7, 0.3), transparent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.achievement-card:hover::before {
    width: 400px;
    height: 400px;
}

.achievement-card:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-colorful);
}

.achievement-badge {
    width: 100px;
    height: 100px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-orange));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
    animation: pulse 2s ease-in-out infinite;
}

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

.achievement-card.locked .achievement-badge {
    background: var(--color-grey);
    opacity: 0.5;
}

.achievement-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.achievement-description {
    font-size: 0.875rem;
    color: var(--color-grey);
    position: relative;
    z-index: 1;
}

.achievement-progress {
    margin-top: 1rem;
    position: relative;
    z-index: 1;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-light);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
}

/* ===== DAILY CHALLENGES - MISSION CARDS ===== */
.daily-challenges {
    padding: var(--spacing-xl) 0;
    background: var(--color-white);
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.challenge-card {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light) 100%);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border-left: 6px solid var(--color-primary);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.challenge-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.1), transparent 70%);
    transform: rotate(0deg);
    transition: transform 10s linear;
}

.challenge-card:hover::after {
    transform: rotate(360deg);
}

.challenge-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-colorful);
    border-left-width: 10px;
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.challenge-type {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.challenge-reward {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.challenge-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-dark);
    position: relative;
    z-index: 1;
}

.challenge-description {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.challenge-progress {
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.challenge-progress-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
}

.challenge-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 2px dashed var(--color-light);
    position: relative;
    z-index: 1;
}

.challenge-time {
    font-size: 0.875rem;
    color: var(--color-grey);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--spacing-xl) 0;
    background: var(--color-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    text-align: center;
    padding: 2.5rem;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 3px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px) rotate(2deg);
    box-shadow: var(--shadow-colorful);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--color-pink), var(--color-purple));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-10deg);
}

.feature-card h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--color-grey);
}

/* ===== CATEGORIES SECTION ===== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    height: 350px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.category-card:hover img {
    transform: scale(1.1);
}

.category-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--color-white);
    padding: 2rem;
}

.category-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-white);
}

/* ===== TESTIMONIALS - COLORFUL CARDS ===== */
.testimonials {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border-top: 6px solid var(--color-primary);
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 20px;
    font-size: 120px;
    font-family: Georgia, serif;
    color: rgba(76, 175, 80, 0.1);
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-game);
}

.testimonial-content, .testimonial-card p {
    position: relative;
    z-index: 1;
    margin-bottom: 1.5rem;
    font-style: italic;
    color: var(--color-grey);
    line-height: 1.8;
}

.testimonial-author, .customer {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-blue), var(--color-cyan));
    box-shadow: var(--shadow-md);
}

.testimonial-info h4, .customer strong {
    margin-bottom: 0.25rem;
    color: var(--color-dark);
    display: block;
}

.testimonial-info p, .customer span {
    font-size: 0.875rem;
    color: var(--color-grey);
    margin: 0;
    font-style: normal;
}

.testimonial-rating, .stars {
    display: flex;
    gap: 0.25rem;
    margin-top: 0.5rem;
    color: var(--color-secondary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.star {
    color: var(--color-secondary);
    font-size: 1.25rem;
}

/* ===== CTA SECTION ===== */
.cta {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-blue) 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.cta-container, .cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta h2 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

.cta h2::after {
    background: var(--color-secondary);
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-family: var(--font-body);
}

.newsletter-form button {
    padding: 1rem 2rem;
    border: none;
    cursor: pointer;
}

/* ===== FORMS & INPUTS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--color-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 3px solid var(--color-light);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
    transform: translateY(-2px);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* ===== CONTACT PAGE ===== */
.contact-main {
    background: var(--color-light);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.contact-form-section h2,
.contact-info-section h2 {
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.contact-form-detail {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.info-block {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    margin-bottom: 1.5rem;
}

.info-icon-large {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.info-block h3 {
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.info-block p {
    color: var(--color-grey);
}

.social-connect {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.social-connect h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.social-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.social-btn {
    padding: 0.75rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-white);
    font-weight: 600;
    transition: all var(--transition-base);
}

.social-btn.facebook {
    background: #1877F2;
}

.social-btn.instagram {
    background: #E4405F;
}

.social-btn.zalo {
    background: #0068FF;
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

/* ===== PRODUCTS CATALOG ===== */
.catalog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--color-light);
    border-radius: var(--radius-lg);
}

.catalog-header select {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    cursor: pointer;
}

.products-grid-full {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
}

.product-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-colorful);
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1;
}

.product-badge.sale {
    background: var(--color-red);
}

.product-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-details {
    padding: 1.5rem;
}

.product-details h3 {
    color: var(--color-dark);
    margin-bottom: 0.5rem;
}

.product-category {
    color: var(--color-grey);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.product-price {
    margin-bottom: 1rem;
}

.current-price {
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 700;
}

.old-price {
    font-size: 1rem;
    color: var(--color-grey);
    text-decoration: line-through;
    margin-left: 0.5rem;
}

/* ===== STORY & VALUES ===== */
.about-story {
    background: var(--color-light);
}

.story-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.story-text h2 {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.story-text p {
    margin-bottom: 1.5rem;
    color: var(--color-grey);
    font-size: 1.05rem;
    line-height: 1.8;
}

.story-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    background: var(--color-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

/* ===== TIMELINE ===== */
.milestones {
    background: var(--color-light);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-year {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    text-align: right;
}

.timeline-content {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

/* ===== TEAM SECTION ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.team-member {
    text-align: center;
    background: var(--color-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-full);
    object-fit: cover;
    margin-bottom: 1rem;
    border: 4px solid var(--color-primary);
}

.team-member h3 {
    color: var(--color-dark);
    margin-bottom: 0.5rem;
}

.team-member p {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.team-member span {
    color: var(--color-grey);
    font-size: 0.9rem;
}

/* ===== FAQ SECTION ===== */
.faq {
    background: var(--color-light);
}

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

.faq-item {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.faq-item p {
    color: var(--color-grey);
    line-height: 1.8;
}

/* ===== FOOTER - PLAYFUL ===== */
footer {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2d3436 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-pink), var(--color-purple), var(--color-blue));
    background-size: 200% 100%;
    animation: gradientSlide 5s linear infinite;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3, .footer-section h4 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.footer-section h3::after, .footer-section h4::after {
    background: var(--color-secondary);
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-base);
    display: inline-block;
}

.footer-section a:hover {
    color: var(--color-secondary);
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.social-link, .social-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-white);
    font-size: 1.5rem;
    transition: all var(--transition-base);
    padding: 0.5rem 1rem;
}

.social-link:hover, .social-icon:hover {
    background: var(--color-primary);
    transform: translateY(-5px) rotate(10deg);
    box-shadow: var(--shadow-md);
}

.contact-info li {
    margin-bottom: 0.75rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== STATS SECTION (FOR INDEX.HTML) ===== */
.stats {
    padding: var(--spacing-lg) 0;
    background: var(--color-white);
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 193, 7, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 3px solid transparent;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-pink));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover {
    transform: translateY(-8px) rotate(2deg);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-colorful);
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item p {
    font-size: 1rem;
    color: var(--color-grey);
    font-weight: 600;
    margin: 0;
}

/* ===== LANGUAGES SECTION (FOR INDEX.HTML) ===== */
.languages {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 25%, #a8edea 75%, #fed6e3 100%);
    position: relative;
    overflow: hidden;
}

.languages::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, transparent 0%, rgba(76, 175, 80, 0.1) 100%);
}

.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

.lang-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 4px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.lang-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, var(--color-primary), var(--color-secondary), var(--color-blue));
    opacity: 0;
    transition: opacity var(--transition-base);
    animation: rotate 3s linear infinite;
}

.lang-card:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-colorful);
}

.lang-card:hover::before {
    opacity: 0.1;
}

.lang-flag {
    font-size: 4rem;
    margin: 0 auto 1rem;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(255, 193, 7, 0.1));
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.lang-card:hover .lang-flag {
    transform: scale(1.1) rotate(5deg);
}

.lang-card h3 {
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    position: relative;
    z-index: 1;
    font-size: 1.5rem;
}

.lang-card p {
    color: var(--color-grey);
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
    line-height: 1.6;
    flex: 1;
}

.lang-price {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 1rem 0;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(255, 193, 7, 0.1));
    border-radius: var(--radius-md);
    position: relative;
    z-index: 1;
}

.lang-card .btn-secondary {
    margin-top: auto;
    position: relative;
    z-index: 1;
}

/* ===== CONTACT SECTION (FOR INDEX.HTML) ===== */
.contact {
    padding: var(--spacing-xl) 0;
    background: var(--color-light);
    position: relative;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border-left: 4px solid var(--color-primary);
}

.info-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-colorful);
    border-left-width: 8px;
}

.info-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.info-text h4 {
    color: var(--color-primary);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.info-text p {
    color: var(--color-grey);
    margin: 0;
    font-size: 1rem;
}

.contact-form {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 3px solid var(--color-light);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--color-white);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
    transform: translateY(-2px);
}

.contact-form textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-form button {
    width: 100%;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    :root {
        --container-padding: 1.5rem;
        --spacing-xl: 4rem;
        --spacing-lg: 2.5rem;
    }

    .hero .container, .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-image {
        order: -1;
    }

    .hero-content {
        padding: 0 var(--spacing-md);
    }

    .language-grid,
    .game-modes-grid,
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .nav-menu, .navbar-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

    .nav-menu.active, .navbar-menu.active {
        left: 0;
    }

    .hamburger, .navbar-toggle {
        display: flex;
    }

    .hamburger.active span:nth-child(1), .navbar-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

    .hamburger.active span:nth-child(3), .navbar-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 3rem;
    }

    .hero-content {
        padding: 0 var(--spacing-md);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn, .btn-primary, .btn-secondary {
        width: 100%;
    }

    .leaderboard-row {
        grid-template-columns: 60px 1fr 80px;
        gap: 0.75rem;
        padding: 1rem;
    }

    .leaderboard-level {
        display: none;
    }

    .language-grid,
    .game-modes-grid,
    .achievements-grid,
    .challenges-grid,
    .features-grid,
    .testimonials-grid,
    .languages-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .story-content,
    .contact-layout,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .catalog-header {
        flex-direction: column;
        gap: 1rem;
    }

    .timeline-item {
        grid-template-columns: 80px 1fr;
        gap: 1rem;
    }

    .timeline-year {
        font-size: 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .logo h1, .navbar-logo {
        font-size: 1.5rem;
    }

    .btn, .btn-primary, .btn-secondary {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .hero-content {
        padding: 0 var(--spacing-sm);
    }

    .language-icon,
    .feature-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .game-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    .achievement-badge {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }
}

/* ===== UTILITIES ===== */
.text-center {
    text-align: center;
}

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

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

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

.bg-light {
    background: var(--color-light);
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* ===== LOADING SPINNER ===== */
.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid var(--color-light);
    border-top-color: var(--color-primary);
    border-right-color: var(--color-secondary);
    border-bottom-color: var(--color-blue);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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