/* ============================================================
   KidEnglish - Vui Học Tiếng Anh
   Design System & App Styles
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
    /* Brand Colors */
    --ke-primary: #8B5CF6;
    --ke-primary-light: #A78BFA;
    --ke-primary-dark: #7C3AED;
    --ke-secondary: #FBBF24;
    --ke-secondary-light: #FCD34D;
    --ke-accent: #F472B6;
    --ke-accent-light: #F9A8D4;

    /* Feedback Colors */
    --ke-success: #34D399;
    --ke-success-light: #6EE7B7;
    --ke-error: #FB7185;
    --ke-error-light: #FDA4AF;
    --ke-warning: #FB923C;
    --ke-info: #60A5FA;

    /* Backgrounds */
    --ke-bg: #FFF7ED;
    --ke-bg-card: #FFFFFF;
    --ke-bg-overlay: rgba(0, 0, 0, 0.5);
    --ke-bg-glass: rgba(255, 255, 255, 0.85);

    /* Text */
    --ke-text: #1E1B4B;
    --ke-text-light: #6B7280;
    --ke-text-white: #FFFFFF;

    /* Gradients */
    --ke-gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --ke-gradient-secondary: linear-gradient(135deg, #FBBF24 0%, #F97316 100%);
    --ke-gradient-success: linear-gradient(135deg, #34D399 0%, #06B6D4 100%);
    --ke-gradient-sky: linear-gradient(180deg, #93C5FD 0%, #BFDBFE 40%, #E0F2FE 100%);
    --ke-gradient-sunset: linear-gradient(135deg, #F472B6 0%, #FBBF24 100%);
    --ke-gradient-ocean: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);

    /* Shadows */
    --ke-shadow-sm: 0 2px 8px rgba(139, 92, 246, 0.15);
    --ke-shadow-md: 0 4px 16px rgba(139, 92, 246, 0.2);
    --ke-shadow-lg: 0 8px 32px rgba(139, 92, 246, 0.25);
    --ke-shadow-glow: 0 0 20px rgba(139, 92, 246, 0.4);

    /* Border Radius */
    --ke-radius-sm: 8px;
    --ke-radius-md: 16px;
    --ke-radius-lg: 24px;
    --ke-radius-xl: 32px;
    --ke-radius-full: 50%;

    /* Fonts */
    --ke-font-heading: 'Quicksand', sans-serif;
    --ke-font-body: 'Nunito', sans-serif;

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

    /* Transitions */
    --ke-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --ke-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--ke-font-body);
    font-size: 16px;
    color: var(--ke-text);
    background: var(--ke-bg);
    line-height: 1.5;
}

#kid-app {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* ---------- Loading Screen ---------- */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--ke-gradient-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-character {
    font-size: 80px;
    animation: loadingBounce 1s var(--ke-bounce) infinite;
}

.loading-text {
    font-family: var(--ke-font-heading);
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin: 20px 0;
}

.loading-bar {
    width: 200px;
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--ke-secondary);
    border-radius: 4px;
    animation: loadingProgress 1.5s ease-out forwards;
}

@keyframes loadingBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes loadingProgress {
    0% {
        width: 0%;
    }

    50% {
        width: 70%;
    }

    100% {
        width: 100%;
    }
}

/* ---------- Screen Container ---------- */
.ke-screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
    overflow: hidden;
}

.ke-screen.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.ke-screen.slide-in-right {
    animation: slideInRight 0.4s ease forwards;
}

.ke-screen.slide-in-left {
    animation: slideInLeft 0.4s ease forwards;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ---------- Welcome Screen ---------- */
.welcome-screen {
    background: var(--ke-gradient-sky);
    justify-content: center;
    align-items: center;
    position: relative;
}

.welcome-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 300px;
    background: url("data:image/svg+xml,%3Csvg width='100%25' height='100%25' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='clouds' patternUnits='userSpaceOnUse' width='300' height='200'%3E%3Cellipse cx='80' cy='100' rx='60' ry='30' fill='rgba(255,255,255,0.4)'/%3E%3Cellipse cx='120' cy='90' rx='50' ry='28' fill='rgba(255,255,255,0.5)'/%3E%3Cellipse cx='200' cy='130' rx='70' ry='35' fill='rgba(255,255,255,0.3)'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23clouds)'/%3E%3C/svg%3E");
    animation: cloudMove 30s linear infinite;
}

@keyframes cloudMove {
    from {
        background-position: 0 0;
    }

    to {
        background-position: 300px 0;
    }
}

.welcome-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--ke-space-lg);
    max-width: 600px;
    width: 100%;
}

.welcome-logo {
    margin-bottom: var(--ke-space-lg);
}

.welcome-logo h1 {
    font-family: var(--ke-font-heading);
    font-size: 42px;
    font-weight: 700;
    background: var(--ke-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    line-height: 1.2;
}

.welcome-logo .subtitle {
    font-size: 18px;
    color: var(--ke-primary-dark);
    font-weight: 600;
    margin-top: 8px;
}

.welcome-mascot {
    font-size: 100px;
    margin: var(--ke-space-lg) 0;
    animation: mascotFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.15));
}

@keyframes mascotFloat {

    0%,
    100% {
        transform: translateY(0) rotate(-2deg);
    }

    50% {
        transform: translateY(-15px) rotate(2deg);
    }
}

/* ---------- Profile Slider ---------- */
.profile-slider {
    width: 100%;
    max-width: 540px;
    margin: var(--ke-space-xl) auto 0;
}

.profile-cards {
    display: flex;
    gap: var(--ke-space-md);
    padding: 4px;
    justify-content: center;
}

.profile-cards::-webkit-scrollbar {
    display: none;
}

.profile-dots {
    display: none;
}

.profile-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.2);
    cursor: pointer;
    transition: var(--ke-transition);
}

.profile-dot.active {
    background: var(--ke-primary);
    transform: scale(1.3);
}

.profile-card {
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    border: 3px solid transparent;
    border-radius: var(--ke-radius-lg);
    padding: var(--ke-space-xl) var(--ke-space-lg);
    min-width: 0;
    flex: 0 0 calc(50% - 8px);
    scroll-snap-align: center;
    cursor: pointer;
    transition: var(--ke-transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.profile-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.profile-card.grade2::before {
    background: var(--ke-gradient-secondary);
}

.profile-card.grade5::before {
    background: var(--ke-gradient-ocean);
}

.profile-card:hover,
.profile-card:active {
    transform: translateY(-8px) scale(1.03);
    box-shadow: var(--ke-shadow-lg);
    border-color: var(--ke-primary);
}

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

.profile-card .avatar {
    font-size: 64px;
    margin-bottom: var(--ke-space-sm);
    transition: transform 0.3s var(--ke-bounce);
}

.profile-card:hover .avatar {
    transform: scale(1.2) rotate(5deg);
    animation: avatarWiggle 0.5s ease;
}

@keyframes avatarWiggle {

    0%,
    100% {
        transform: scale(1.2) rotate(0deg);
    }

    25% {
        transform: scale(1.2) rotate(10deg);
    }

    75% {
        transform: scale(1.2) rotate(-10deg);
    }
}

.profile-card .grade-label {
    font-family: var(--ke-font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--ke-text);
    margin-bottom: 4px;
}

.profile-card .grade-desc {
    font-size: 13px;
    color: var(--ke-text-light);
}

.profile-card .stars-info {
    margin-top: var(--ke-space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 14px;
    color: var(--ke-secondary);
    font-weight: 700;
}

/* ---------- Top Bar (Map, Unit, Game screens) ---------- */
.ke-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--ke-space-sm) var(--ke-space-md);
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    z-index: 10;
    flex-shrink: 0;
}

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

.ke-topbar-right {
    display: flex;
    align-items: center;
    gap: var(--ke-space-md);
}

.ke-btn-back {
    width: 40px;
    height: 40px;
    border-radius: var(--ke-radius-full);
    border: none;
    background: var(--ke-bg);
    color: var(--ke-primary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--ke-transition);
}

.ke-btn-back:hover {
    background: var(--ke-primary);
    color: white;
    transform: scale(1.1);
}

.ke-topbar-title {
    font-family: var(--ke-font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--ke-text);
}

.ke-stat-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--ke-bg);
    padding: 6px 12px;
    border-radius: var(--ke-radius-lg);
    font-size: 14px;
    font-weight: 700;
}

.ke-stat-badge.xp {
    color: var(--ke-primary);
    border: 2px solid var(--ke-primary-light);
}

.ke-stat-badge.gems {
    color: #06B6D4;
    border: 2px solid #67E8F9;
}

.ke-stat-badge.streak {
    color: var(--ke-warning);
    border: 2px solid #FDBA74;
}

/* ---------- Map Screen ---------- */
.map-screen {
    background: var(--ke-gradient-sky);
}

.map-container {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    display: flex;
    align-items: center;
    padding: var(--ke-space-xl) var(--ke-space-lg);
    scroll-behavior: smooth;
    position: relative;
}

.map-path {
    display: flex;
    align-items: center;
    gap: 0;
    position: relative;
    padding: 40px 60px;
    min-width: max-content;
}

.map-path::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 60px;
    right: 60px;
    height: 6px;
    background: repeating-linear-gradient(90deg,
            var(--ke-primary-light) 0px,
            var(--ke-primary-light) 10px,
            transparent 10px,
            transparent 20px);
    border-radius: 3px;
    transform: translateY(-50%);
    z-index: 0;
}

.map-island {
    position: relative;
    z-index: 1;
    width: 140px;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: var(--ke-transition);
    margin: 0 20px;
}

.map-island:nth-child(even) {
    transform: translateY(-30px);
}

.map-island:nth-child(odd) {
    transform: translateY(30px);
}

.map-island:hover {
    transform: translateY(-10px) scale(1.08) !important;
}

.island-circle {
    width: 100px;
    height: 100px;
    border-radius: var(--ke-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    position: relative;
    box-shadow: var(--ke-shadow-md);
    transition: var(--ke-transition);
    border: 4px solid white;
}

.map-island:hover .island-circle {
    box-shadow: var(--ke-shadow-glow);
}

.island-circle.unlocked {
    background: var(--ke-bg-card);
}

.island-circle.locked {
    background: #E5E7EB;
    filter: grayscale(0.5);
    opacity: 0.6;
}

.island-circle.completed {
    background: var(--ke-bg-card);
    border-color: var(--ke-success);
}

.island-circle.completed::after {
    content: '✅';
    position: absolute;
    top: -8px;
    right: -8px;
    font-size: 24px;
}

.island-circle.locked::after {
    content: '🔒';
    position: absolute;
    top: -8px;
    right: -8px;
    font-size: 20px;
}

.island-label {
    margin-top: var(--ke-space-sm);
    font-family: var(--ke-font-heading);
    font-size: 13px;
    font-weight: 700;
    color: var(--ke-text);
    text-align: center;
    max-width: 120px;
}

.island-stars {
    display: flex;
    gap: 2px;
    margin-top: 4px;
}

.island-stars .star {
    font-size: 16px;
    opacity: 0.3;
}

.island-stars .star.filled {
    opacity: 1;
    animation: starPop 0.3s var(--ke-bounce);
}

@keyframes starPop {
    0% {
        transform: scale(0);
    }

    100% {
        transform: scale(1);
    }
}

/* ---------- Unit Detail Screen ---------- */
.unit-screen {
    background: var(--ke-bg);
}

.unit-header {
    text-align: center;
    padding: var(--ke-space-lg);
    background: var(--ke-gradient-primary);
    border-radius: 0 0 var(--ke-radius-xl) var(--ke-radius-xl);
    color: white;
    position: relative;
    overflow: hidden;
}

.unit-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 60%);
    animation: headerShine 3s ease-in-out infinite;
}

@keyframes headerShine {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(10%, 10%);
    }
}

.unit-header-icon {
    font-size: 60px;
    margin-bottom: var(--ke-space-sm);
    position: relative;
    z-index: 1;
}

.unit-header h2 {
    font-family: var(--ke-font-heading);
    font-size: 28px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.unit-header .unit-subtitle {
    font-size: 15px;
    opacity: 0.9;
    margin-top: 4px;
    position: relative;
    z-index: 1;
}

.unit-progress-bar {
    width: 80%;
    max-width: 300px;
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    margin: 12px auto 0;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.unit-progress-fill {
    height: 100%;
    background: var(--ke-secondary);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.unit-games-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--ke-space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--ke-space-md);
}

.game-card {
    display: flex;
    align-items: center;
    gap: var(--ke-space-md);
    background: var(--ke-bg-card);
    border-radius: var(--ke-radius-md);
    padding: var(--ke-space-md) var(--ke-space-lg);
    box-shadow: var(--ke-shadow-sm);
    cursor: pointer;
    transition: var(--ke-transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.game-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
}

.game-card:nth-child(1)::before {
    background: var(--ke-primary);
}

.game-card:nth-child(2)::before {
    background: var(--ke-info);
}

.game-card:nth-child(3)::before {
    background: var(--ke-success);
}

.game-card:nth-child(4)::before {
    background: var(--ke-secondary);
}

.game-card:nth-child(5)::before {
    background: var(--ke-accent);
}

.game-card:hover {
    transform: translateX(8px);
    box-shadow: var(--ke-shadow-md);
    border-color: var(--ke-primary-light);
}

.game-card.locked {
    opacity: 0.5;
    pointer-events: none;
    filter: grayscale(0.5);
}

.game-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--ke-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.game-card:nth-child(1) .game-card-icon {
    background: linear-gradient(135deg, #EDE9FE, #DDD6FE);
}

.game-card:nth-child(2) .game-card-icon {
    background: linear-gradient(135deg, #DBEAFE, #BFDBFE);
}

.game-card:nth-child(3) .game-card-icon {
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
}

.game-card:nth-child(4) .game-card-icon {
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
}

.game-card:nth-child(5) .game-card-icon {
    background: linear-gradient(135deg, #FCE7F3, #FBCFE8);
}

.game-card-info {
    flex: 1;
}

.game-card-name {
    font-family: var(--ke-font-heading);
    font-size: 16px;
    font-weight: 700;
    color: var(--ke-text);
}

.game-card-desc {
    font-size: 13px;
    color: var(--ke-text-light);
    margin-top: 2px;
}

.game-card-stars {
    display: flex;
    gap: 3px;
    font-size: 16px;
}

/* ---------- Game Screen ---------- */
.game-screen {
    background: var(--ke-bg);
    display: flex;
    flex-direction: column;
}

.game-progress {
    padding: 0 var(--ke-space-md);
    flex-shrink: 0;
}

.game-progress-bar {
    height: 10px;
    background: #E5E7EB;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.game-progress-fill {
    height: 100%;
    background: var(--ke-gradient-primary);
    border-radius: 5px;
    transition: width 0.4s ease;
    position: relative;
}

.game-progress-fill::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 20px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5));
    border-radius: 5px;
}

.game-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--ke-space-lg);
    overflow: hidden;
}

.game-question {
    text-align: center;
    margin-bottom: var(--ke-space-xl);
}

.game-question-text {
    font-family: var(--ke-font-heading);
    font-size: 22px;
    font-weight: 700;
    color: var(--ke-text);
    margin-bottom: var(--ke-space-md);
}

.game-question .word-display {
    font-size: 48px;
    font-weight: 800;
    color: var(--ke-primary);
    margin: var(--ke-space-md) 0;
    letter-spacing: 2px;
}

.game-question .word-image {
    width: 150px;
    height: 150px;
    border-radius: var(--ke-radius-lg);
    object-fit: cover;
    box-shadow: var(--ke-shadow-md);
    margin: var(--ke-space-md) auto;
    display: block;
}

.game-question .word-emoji {
    font-size: 80px;
    margin: var(--ke-space-md) 0;
    display: block;
}

/* Game: Listen & Pick, Match Mania - Option Buttons */
.game-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--ke-space-md);
    width: 100%;
    max-width: 500px;
}

.game-option-btn {
    background: var(--ke-bg-card);
    border: 3px solid #E5E7EB;
    border-radius: var(--ke-radius-md);
    padding: var(--ke-space-md);
    font-family: var(--ke-font-body);
    font-size: 18px;
    font-weight: 700;
    color: var(--ke-text);
    cursor: pointer;
    transition: var(--ke-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--ke-space-sm);
    min-height: 90px;
    justify-content: center;
}

.game-option-btn:hover {
    border-color: var(--ke-primary);
    transform: translateY(-4px);
    box-shadow: var(--ke-shadow-md);
}

.game-option-btn:active {
    transform: scale(0.95);
}

.game-option-btn.correct {
    border-color: var(--ke-success);
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
    animation: correctPulse 0.5s ease;
}

.game-option-btn.incorrect {
    border-color: var(--ke-error);
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    animation: incorrectShake 0.4s ease;
}

.game-option-btn .option-emoji {
    font-size: 36px;
}

.game-option-btn .option-text {
    font-size: 15px;
}

.game-option-btn .option-image {
    width: 60px;
    height: 60px;
    border-radius: var(--ke-radius-sm);
    object-fit: cover;
}

@keyframes correctPulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes incorrectShake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-8px);
    }

    75% {
        transform: translateX(8px);
    }
}

/* Game: Flashcard */
.flashcard-container {
    perspective: 1000px;
    width: 300px;
    height: 380px;
    margin: 0 auto;
}

.flashcard {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    cursor: pointer;
    border-radius: var(--ke-radius-lg);
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: var(--ke-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--ke-space-lg);
    box-shadow: var(--ke-shadow-lg);
}

.flashcard-front {
    background: var(--ke-gradient-primary);
    color: white;
}

.flashcard-front .card-emoji {
    font-size: 80px;
    margin-bottom: var(--ke-space-md);
}

.flashcard-front .card-label {
    font-family: var(--ke-font-heading);
    font-size: 14px;
    opacity: 0.8;
}

.flashcard-back {
    background: white;
    transform: rotateY(180deg);
}

.flashcard-back .card-image {
    width: 120px;
    height: 120px;
    border-radius: var(--ke-radius-md);
    object-fit: cover;
    margin-bottom: var(--ke-space-md);
    box-shadow: var(--ke-shadow-sm);
}

.flashcard-back .card-word {
    font-family: var(--ke-font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--ke-primary);
    margin-bottom: 2px;
}

.flashcard-back .card-phonetic {
    font-size: 16px;
    color: #e67e22;
    font-family: 'Segoe UI', 'Lucida Sans Unicode', sans-serif;
    font-style: italic;
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.flashcard-back .card-meaning {
    font-size: 16px;
    color: var(--ke-text-light);
    margin-bottom: var(--ke-space-md);
}

.flashcard-back .card-sentence {
    font-size: 14px;
    color: var(--ke-text);
    text-align: center;
    font-style: italic;
    padding: var(--ke-space-sm) var(--ke-space-md);
    background: var(--ke-bg);
    border-radius: var(--ke-radius-sm);
}

.flashcard-back .card-emoji-display {
    font-size: 80px;
    margin-bottom: var(--ke-space-md);
}

/* Flashcard nav */
.flashcard-nav {
    display: flex;
    gap: var(--ke-space-md);
    margin-top: var(--ke-space-xl);
    align-items: center;
}

.btn-card-nav {
    width: 48px;
    height: 48px;
    border-radius: var(--ke-radius-full);
    border: none;
    background: var(--ke-bg-card);
    box-shadow: var(--ke-shadow-sm);
    font-size: 22px;
    cursor: pointer;
    transition: var(--ke-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-card-nav:hover {
    background: var(--ke-primary);
    color: white;
    transform: scale(1.1);
}

.btn-card-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-card-listen {
    width: 56px;
    height: 56px;
    border-radius: var(--ke-radius-full);
    border: 3px solid var(--ke-primary);
    background: white;
    color: var(--ke-primary);
    font-size: 24px;
    cursor: pointer;
    transition: var(--ke-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-card-listen:hover {
    background: var(--ke-primary);
    color: white;
    transform: scale(1.1);
}

.btn-card-listen.playing {
    animation: speakerPulse 1s ease infinite;
}

.btn-card-slow {
    width: 48px;
    height: 48px;
    border-radius: var(--ke-radius-full);
    border: 2px solid #e67e22;
    background: white;
    color: #e67e22;
    font-size: 22px;
    cursor: pointer;
    transition: var(--ke-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-card-slow:hover {
    background: #e67e22;
    color: white;
    transform: scale(1.1);
}

.btn-card-slow.playing {
    animation: speakerPulse 1s ease infinite;
}

/* ---------- Mic Button ---------- */
.btn-card-mic {
    width: 52px;
    height: 52px;
    border-radius: var(--ke-radius-full);
    border: 3px solid #e74c3c;
    background: white;
    color: #e74c3c;
    font-size: 24px;
    cursor: pointer;
    transition: var(--ke-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-card-mic:hover {
    background: #e74c3c;
    color: white;
    transform: scale(1.1);
}

.btn-card-mic.recording {
    background: #e74c3c;
    color: white;
    animation: micPulse 1s ease infinite;
    box-shadow: 0 0 0 6px rgba(231, 76, 60, 0.2);
}

.btn-card-mic.correct {
    border-color: var(--ke-success);
    color: var(--ke-success);
    background: #ecfdf5;
}

@keyframes micPulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.2);
    }

    50% {
        transform: scale(1.08);
        box-shadow: 0 0 0 10px rgba(231, 76, 60, 0.1);
    }
}

/* ---------- Speak Area ---------- */
.fc-speak-area {
    text-align: center;
    padding: 8px 16px;
    margin-top: 8px;
    display: none;
}

.fc-speak-status {
    font-size: 15px;
    font-weight: 600;
    color: var(--ke-text);
    margin-bottom: 4px;
}

.fc-speak-status.listening {
    color: #e74c3c;
}

.fc-speak-status.correct {
    color: var(--ke-success);
}

.fc-speak-status.wrong {
    color: var(--ke-error);
}

.fc-speak-status.error {
    color: var(--ke-warning);
}

.fc-speak-result {
    font-size: 14px;
    color: var(--ke-text-light);
    line-height: 1.5;
}

.fc-speak-result.correct {
    color: var(--ke-success);
    font-weight: 600;
}

.fc-speak-result.wrong {
    color: var(--ke-error);
}

.fc-skip-btn {
    margin-top: 8px;
    padding: 8px 20px;
    border: 2px solid var(--ke-text-light);
    background: white;
    border-radius: var(--ke-radius-sm);
    font-size: 14px;
    color: var(--ke-text-light);
    cursor: pointer;
    transition: var(--ke-transition);
}

.fc-skip-btn:hover {
    background: var(--ke-bg);
    color: var(--ke-text);
}

@keyframes speakerPulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.4);
    }

    50% {
        box-shadow: 0 0 0 12px rgba(139, 92, 246, 0);
    }
}

.flashcard-counter {
    font-family: var(--ke-font-heading);
    font-size: 14px;
    color: var(--ke-text-light);
    font-weight: 600;
}

/* Match Mania */
.match-container {
    display: flex;
    gap: var(--ke-space-xl);
    width: 100%;
    max-width: 600px;
    justify-content: center;
}

.match-column {
    display: flex;
    flex-direction: column;
    gap: var(--ke-space-md);
    flex: 1;
}

.match-item {
    background: var(--ke-bg-card);
    border: 3px solid #E5E7EB;
    border-radius: var(--ke-radius-md);
    padding: var(--ke-space-md);
    text-align: center;
    cursor: pointer;
    transition: var(--ke-transition);
    font-family: var(--ke-font-heading);
    font-size: 16px;
    font-weight: 700;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--ke-space-sm);
}

.match-item:hover {
    border-color: var(--ke-primary);
    transform: scale(1.03);
}

.match-item.selected {
    border-color: var(--ke-primary);
    background: linear-gradient(135deg, #EDE9FE, #DDD6FE);
    box-shadow: var(--ke-shadow-md);
}

.match-item.matched {
    border-color: var(--ke-success);
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
    pointer-events: none;
    opacity: 0.7;
}

.match-item.wrong {
    border-color: var(--ke-error);
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    animation: incorrectShake 0.4s ease;
}

.match-item .match-emoji {
    font-size: 28px;
}

/* ---------- Result Screen ---------- */
.result-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    animation: fadeIn 0.3s ease forwards;
    pointer-events: all;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.result-card {
    background: white;
    border-radius: var(--ke-radius-xl);
    padding: var(--ke-space-2xl);
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: var(--ke-shadow-lg);
    animation: resultBounceIn 0.5s var(--ke-bounce);
}

@keyframes resultBounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.result-emoji {
    font-size: 80px;
    margin-bottom: var(--ke-space-md);
}

.result-title {
    font-family: var(--ke-font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--ke-text);
    margin-bottom: var(--ke-space-sm);
}

.result-subtitle {
    font-size: 16px;
    color: var(--ke-text-light);
    margin-bottom: var(--ke-space-lg);
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: var(--ke-space-lg);
    margin-bottom: var(--ke-space-xl);
}

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

.result-stat-value {
    font-family: var(--ke-font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--ke-primary);
}

.result-stat-label {
    font-size: 12px;
    color: var(--ke-text-light);
    margin-top: 2px;
}

.result-stars {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: var(--ke-space-lg);
    font-size: 36px;
}

.result-stars .star {
    animation: resultStarPop 0.3s var(--ke-bounce);
    animation-fill-mode: both;
}

.result-stars .star:nth-child(2) {
    animation-delay: 0.2s;
}

.result-stars .star:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes resultStarPop {
    0% {
        transform: scale(0) rotate(-180deg);
    }

    100% {
        transform: scale(1) rotate(0deg);
    }
}

.result-xp {
    background: var(--ke-gradient-primary);
    color: white;
    border-radius: var(--ke-radius-lg);
    padding: var(--ke-space-sm) var(--ke-space-lg);
    display: inline-block;
    font-family: var(--ke-font-heading);
    font-weight: 700;
    font-size: 18px;
    margin-bottom: var(--ke-space-lg);
}

.result-buttons {
    display: flex;
    gap: var(--ke-space-md);
    justify-content: center;
}

/* ---------- General Buttons ---------- */
.ke-btn {
    font-family: var(--ke-font-heading);
    font-weight: 700;
    font-size: 16px;
    border: none;
    border-radius: var(--ke-radius-lg);
    padding: 12px 28px;
    cursor: pointer;
    transition: var(--ke-transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ke-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--ke-shadow-md);
}

.ke-btn:active {
    transform: scale(0.95);
}

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

.ke-btn-secondary {
    background: var(--ke-bg);
    color: var(--ke-text);
    border: 2px solid #E5E7EB;
}

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

/* ---------- Confetti ---------- */
.confetti-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 200;
    overflow: hidden;
}

.confetti-piece {
    position: absolute;
    width: 10px;
    height: 10px;
    top: -10px;
    animation: confettiFall 3s ease-in forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }

    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ---------- Feedback Toast ---------- */
.feedback-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-size: 64px;
    z-index: 150;
    animation: toastPop 0.8s var(--ke-bounce) forwards;
    pointer-events: none;
}

@keyframes toastPop {
    0% {
        transform: translate(-50%, -50%) scale(0);
    }

    30% {
        transform: translate(-50%, -50%) scale(1.3);
    }

    100% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0;
    }
}

/* ---------- Profile Screen ---------- */
.profile-screen {
    background: var(--ke-bg);
}

.profile-header {
    text-align: center;
    padding: var(--ke-space-2xl) var(--ke-space-lg);
    background: var(--ke-gradient-primary);
    border-radius: 0 0 var(--ke-radius-xl) var(--ke-radius-xl);
    color: white;
    position: relative;
}

.profile-avatar-large {
    font-size: 80px;
    margin-bottom: var(--ke-space-sm);
}

.profile-name {
    font-family: var(--ke-font-heading);
    font-size: 24px;
    font-weight: 700;
}

.profile-level {
    font-size: 16px;
    opacity: 0.9;
    margin-top: 4px;
}

.profile-xp-bar {
    width: 200px;
    height: 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    margin: 12px auto 0;
    overflow: hidden;
}

.profile-xp-fill {
    height: 100%;
    background: var(--ke-secondary);
    border-radius: 5px;
    transition: width 0.5s ease;
}

.profile-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--ke-space-lg);
}

.profile-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--ke-space-md);
    margin-bottom: var(--ke-space-xl);
}

.profile-stat-card {
    background: var(--ke-bg-card);
    border-radius: var(--ke-radius-md);
    padding: var(--ke-space-md);
    text-align: center;
    box-shadow: var(--ke-shadow-sm);
}

.profile-stat-card .stat-icon {
    font-size: 28px;
}

.profile-stat-card .stat-value {
    font-family: var(--ke-font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--ke-primary);
}

.profile-stat-card .stat-label {
    font-size: 12px;
    color: var(--ke-text-light);
}

.section-title {
    font-family: var(--ke-font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--ke-text);
    margin-bottom: var(--ke-space-md);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--ke-space-md);
    margin-bottom: var(--ke-space-xl);
}

.badge-item {
    background: var(--ke-bg-card);
    border-radius: var(--ke-radius-md);
    padding: var(--ke-space-md);
    text-align: center;
    box-shadow: var(--ke-shadow-sm);
    transition: var(--ke-transition);
}

.badge-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--ke-shadow-md);
}

.badge-item .badge-icon {
    font-size: 32px;
}

.badge-item .badge-name {
    font-size: 11px;
    font-weight: 700;
    color: var(--ke-text);
    margin-top: 4px;
}

.badge-item.locked {
    opacity: 0.3;
    filter: grayscale(1);
}

/* ---------- Bottom Tab Bar ---------- */
.ke-tab-bar {
    display: flex;
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    flex-shrink: 0;
    z-index: 10;
}

.ke-tab-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 0;
    cursor: pointer;
    transition: var(--ke-transition);
    gap: 2px;
    border: none;
    background: none;
    font-family: var(--ke-font-body);
}

.ke-tab-item .tab-icon {
    font-size: 22px;
    transition: var(--ke-transition);
}

.ke-tab-item .tab-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--ke-text-light);
    transition: var(--ke-transition);
}

.ke-tab-item.active .tab-icon {
    transform: scale(1.2);
}

.ke-tab-item.active .tab-label {
    color: var(--ke-primary);
    font-weight: 700;
}

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
    .welcome-logo h1 {
        font-size: 32px;
    }

    .welcome-mascot {
        font-size: 72px;
    }

    .profile-cards {
        gap: var(--ke-space-sm);
    }

    .profile-card {
        flex: 0 0 calc(50% - 6px);
        min-width: 0;
        padding: var(--ke-space-md) var(--ke-space-sm);
    }

    .profile-card .avatar {
        font-size: 40px;
    }

    .profile-card .grade-label {
        font-size: 18px;
    }

    .game-options {
        grid-template-columns: 1fr 1fr;
        gap: var(--ke-space-sm);
    }

    .game-option-btn {
        padding: var(--ke-space-sm);
        min-height: 70px;
        font-size: 15px;
    }

    .game-option-btn .option-emoji {
        font-size: 28px;
    }

    .flashcard-container {
        width: 260px;
        height: 340px;
    }

    .match-container {
        gap: var(--ke-space-md);
    }

    .match-item {
        padding: var(--ke-space-sm);
        font-size: 14px;
    }

    .result-card {
        padding: var(--ke-space-lg);
    }

    .result-emoji {
        font-size: 60px;
    }

    .result-title {
        font-size: 22px;
    }

    .island-circle {
        width: 80px;
        height: 80px;
        font-size: 36px;
    }

    .map-island {
        width: 110px;
        min-width: 110px;
        margin: 0 10px;
    }

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

    .profile-stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--ke-space-sm);
    }
}

@media (min-width: 768px) {
    .game-options {
        max-width: 600px;
    }

    .flashcard-container {
        width: 340px;
        height: 420px;
    }
}

/* ============================================================
   LOGIN SCREEN
   ============================================================ */
.login-screen {
    background: var(--ke-gradient-sky);
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.login-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--ke-space-lg);
    max-width: 480px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-mascot-area {
    position: relative;
    margin-bottom: var(--ke-space-lg);
}

.login-mascot {
    font-size: 100px;
    animation: mascotFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.15));
}

.login-stars {
    position: absolute;
    inset: -20px;
    pointer-events: none;
}

.login-star {
    position: absolute;
    font-size: 24px;
    animation: starTwinkle 2s ease-in-out infinite;
}

.login-star.s1 {
    top: 0;
    left: 10%;
    animation-delay: 0s;
}

.login-star.s2 {
    top: 20%;
    right: 5%;
    animation-delay: 0.5s;
}

.login-star.s3 {
    bottom: 10%;
    left: 5%;
    animation-delay: 1s;
}

.login-star.s4 {
    bottom: 0;
    right: 15%;
    animation-delay: 1.5s;
}

@keyframes starTwinkle {

    0%,
    100% {
        opacity: 0.4;
        transform: scale(0.8);
    }

    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.login-title-area {
    margin-bottom: var(--ke-space-xl);
}

.login-title {
    font-family: var(--ke-font-heading);
    font-size: 42px;
    font-weight: 700;
    background: var(--ke-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.login-subtitle {
    font-size: 18px;
    color: var(--ke-primary-dark);
    font-weight: 600;
    margin-top: 8px;
}

.login-features {
    display: flex;
    flex-direction: column;
    gap: var(--ke-space-sm);
    margin-bottom: var(--ke-space-xl);
    width: 100%;
    max-width: 300px;
}

.login-feature-item {
    display: flex;
    align-items: center;
    gap: var(--ke-space-md);
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    padding: 10px 16px;
    border-radius: var(--ke-radius-md);
    font-size: 14px;
    font-weight: 600;
    color: var(--ke-text);
    transition: var(--ke-transition);
}

.login-feature-item:hover {
    transform: translateX(4px);
    box-shadow: var(--ke-shadow-sm);
}

.feature-icon {
    font-size: 22px;
    flex-shrink: 0;
}

/* Google Login Button */
.login-google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: #FFFFFF;
    color: #333;
    border: 2px solid #E5E7EB;
    border-radius: var(--ke-radius-lg);
    padding: 14px 32px;
    font-family: var(--ke-font-heading);
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--ke-transition);
    box-shadow: var(--ke-shadow-sm);
    width: 100%;
    max-width: 320px;
}

.login-google-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--ke-shadow-md);
    border-color: #4285F4;
}

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

.google-icon {
    flex-shrink: 0;
}

.login-footer {
    margin-top: var(--ke-space-lg);
    font-size: 13px;
    color: var(--ke-text-light);
    line-height: 1.6;
}

.login-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--ke-space-md);
    margin-top: var(--ke-space-md);
    color: var(--ke-primary);
    font-weight: 600;
}

.login-spinner {
    width: 36px;
    height: 36px;
    border: 4px solid var(--ke-primary-light);
    border-top-color: var(--ke-primary);
    border-radius: 50%;
    animation: spinnerRotate 0.8s linear infinite;
}

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

.login-error {
    background: var(--ke-error-light);
    color: #B91C1C;
    padding: 10px 20px;
    border-radius: var(--ke-radius-md);
    font-size: 14px;
    font-weight: 600;
    margin-top: var(--ke-space-md);
    animation: slideInRight 0.3s ease;
}

/* ============================================================
   LEADERBOARD SCREEN
   ============================================================ */
.leaderboard-screen {
    background: var(--ke-bg);
}

.lb-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--ke-space-md);
    padding-bottom: 80px;
}

.lb-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--ke-space-2xl);
    color: var(--ke-text-light);
    gap: var(--ke-space-md);
}

/* My Rank Banner */
.lb-my-rank {
    background: var(--ke-gradient-primary);
    border-radius: var(--ke-radius-lg);
    padding: var(--ke-space-md) var(--ke-space-lg);
    margin-bottom: var(--ke-space-lg);
    color: white;
    position: relative;
    overflow: hidden;
}

.lb-my-rank::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
}

.lb-my-rank-label {
    font-size: 12px;
    opacity: 0.8;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.lb-my-rank-info {
    display: flex;
    align-items: center;
    gap: var(--ke-space-md);
    position: relative;
    z-index: 1;
}

.lb-rank-number {
    font-family: var(--ke-font-heading);
    font-size: 28px;
    font-weight: 700;
    min-width: 50px;
}

.lb-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--ke-radius-full);
    border: 2px solid rgba(255, 255, 255, 0.5);
    object-fit: cover;
}

.lb-name {
    flex: 1;
    font-weight: 700;
    font-size: 16px;
}

.lb-gems {
    font-size: 16px;
    font-weight: 700;
}

/* Leaderboard List */
.lb-items {
    display: flex;
    flex-direction: column;
    gap: var(--ke-space-sm);
}

.lb-item {
    display: flex;
    align-items: center;
    gap: var(--ke-space-md);
    background: var(--ke-bg-card);
    border-radius: var(--ke-radius-md);
    padding: 12px 16px;
    transition: var(--ke-transition);
    border: 2px solid transparent;
}

.lb-item:hover {
    transform: translateX(4px);
    box-shadow: var(--ke-shadow-sm);
}

/* Top 3 special styles */
.lb-item.lb-top-1 {
    border-color: #FBBF24;
    background: linear-gradient(135deg, #FFFBEB, #FEF3C7);
    box-shadow: 0 2px 12px rgba(251, 191, 36, 0.2);
}

.lb-item.lb-top-2 {
    border-color: #9CA3AF;
    background: linear-gradient(135deg, #F9FAFB, #F3F4F6);
}

.lb-item.lb-top-3 {
    border-color: #D97706;
    background: linear-gradient(135deg, #FFF7ED, #FFEDD5);
}

.lb-item.lb-item-me {
    border-color: var(--ke-primary);
    background: linear-gradient(135deg, #EDE9FE, #DDD6FE);
}

.lb-item-rank {
    font-size: 24px;
    min-width: 40px;
    text-align: center;
}

.lb-rank-num {
    font-family: var(--ke-font-heading);
    font-size: 16px;
    font-weight: 700;
    color: var(--ke-text-light);
}

.lb-item-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--ke-radius-full);
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ke-bg);
}

.lb-item-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--ke-radius-full);
}

.lb-avatar-emoji {
    font-size: 28px;
}

.lb-item-info {
    flex: 1;
    min-width: 0;
}

.lb-item-name {
    font-family: var(--ke-font-heading);
    font-size: 15px;
    font-weight: 700;
    color: var(--ke-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lb-item-stats {
    font-size: 12px;
    color: var(--ke-text-light);
    margin-top: 2px;
}

.lb-item-gems {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.lb-gems-icon {
    font-size: 18px;
}

.lb-gems-value {
    font-family: var(--ke-font-heading);
    font-size: 18px;
    font-weight: 700;
    color: #06B6D4;
}

.lb-empty {
    text-align: center;
    padding: var(--ke-space-2xl);
    color: var(--ke-text-light);
    font-size: 16px;
}

/* Leaderboard responsive */
@media (max-width: 480px) {
    .lb-item {
        padding: 10px 12px;
        gap: var(--ke-space-sm);
    }

    .lb-item-avatar {
        width: 36px;
        height: 36px;
    }

    .lb-item-name {
        font-size: 14px;
    }

    .lb-gems-value {
        font-size: 16px;
    }

    .login-title {
        font-size: 32px;
    }

    .login-mascot {
        font-size: 80px;
    }
}

/* Shortcode wrapper - embedded mode */
#ke-shortcode-wrapper #kid-app {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    position: relative;
}

#ke-shortcode-wrapper .ke-screen {
    position: absolute;
    inset: 0;
}

/* ---------- Login Admin Link ---------- */
.login-admin-link {
    font-size: inherit;
    color: var(--ke-text-light);
    text-decoration: none;
    opacity: 0.7;
    transition: var(--ke-transition);
}

.login-admin-link:hover {
    opacity: 1;
    color: var(--ke-primary);
    text-decoration: underline;
}

/* ---------- Login Company Credit ---------- */
.login-company {
    margin-top: 20px;
    font-size: 11px;
    color: var(--ke-text-light);
    text-align: center;
    line-height: 1.6;
    opacity: 0.5;
}

/* ---------- Welcome Top Bar ---------- */
.ke-welcome-topbar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    z-index: 100;
}

.ke-welcome-topbar-left,
.ke-welcome-topbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ke-logo-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--ke-radius-full);
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(139, 92, 246, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    text-decoration: none;
    transition: var(--ke-transition);
    box-shadow: var(--ke-shadow-sm);
}

.ke-logo-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--ke-shadow-md);
    border-color: var(--ke-primary);
}

.ke-logo-img {
    width: 32px;
    height: 32px;
    border-radius: var(--ke-radius-full);
    object-fit: cover;
}

.ke-icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--ke-radius-full);
    background: var(--ke-bg-glass);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(139, 92, 246, 0.15);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--ke-transition);
    box-shadow: var(--ke-shadow-sm);
}

.ke-icon-btn:hover {
    transform: scale(1.1);
    background: var(--ke-primary);
    color: white;
    border-color: var(--ke-primary);
    box-shadow: var(--ke-shadow-md);
}

/* ---------- Sidebar Overlay ---------- */
.ke-sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.ke-sidebar-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

/* ---------- Sidebar Menu ---------- */
.ke-sidebar {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    max-width: 85vw;
    height: 100%;
    background: white;
    z-index: 999;
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.ke-sidebar.open {
    right: 0;
}

.ke-sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    background: var(--ke-gradient-primary);
    color: white;
    position: relative;
}

.ke-sidebar-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--ke-radius-full);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.ke-sidebar-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ke-sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.ke-sidebar-name {
    font-family: var(--ke-font-heading);
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ke-sidebar-email {
    font-size: 12px;
    opacity: 0.8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ke-sidebar-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: var(--ke-radius-full);
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--ke-transition);
}

.ke-sidebar-close:hover {
    background: rgba(255, 255, 255, 0.4);
}

.ke-sidebar-body {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.ke-sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    border: none;
    background: none;
    font-size: 15px;
    font-family: var(--ke-font-body);
    color: var(--ke-text);
    cursor: pointer;
    transition: var(--ke-transition);
    text-align: left;
}

.ke-sidebar-item:hover {
    background: var(--ke-bg);
}

.ke-sidebar-item-icon {
    font-size: 20px;
    width: 28px;
    text-align: center;
}

.ke-sidebar-badge {
    margin-left: auto;
    font-size: 13px;
    color: var(--ke-text-light);
    font-weight: 600;
}

.ke-sidebar-divider {
    height: 1px;
    background: #f0f0f0;
    margin: 8px 16px;
}

.ke-sidebar-section-title {
    padding: 8px 20px 4px;
    font-size: 12px;
    font-weight: 700;
    color: var(--ke-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ke-sidebar-logout {
    color: var(--ke-error) !important;
}

.ke-sidebar-footer {
    padding: 12px 16px;
    text-align: center;
    border-top: 1px solid #f0f0f0;
    color: var(--ke-text-light);
    font-size: 10px;
    opacity: 0.6;
}

/* ---------- Listen & Pick: Nút nghe ---------- */
.lp-listen-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 12px auto;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--ke-primary), #764ba2);
    color: white;
    border: none;
    border-radius: var(--ke-radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--ke-transition);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.lp-listen-btn:active {
    transform: scale(0.95);
}

.lp-listen-btn.playing {
    animation: listenPulse 0.8s ease infinite;
}

.lp-listen-icon {
    font-size: 20px;
}

@keyframes listenPulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
    }
}

/* ============================================
   GAME: ĐẬP TỪ VỰNG (Word Smash)
   ============================================ */

.ws-game-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 0 !important;
}

.ws-target {
    text-align: center;
    padding: 12px 16px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 0 0 var(--ke-radius-lg) var(--ke-radius-lg);
}

.ws-target-label {
    font-size: 12px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ws-target-word {
    font-size: 24px;
    font-weight: 800;
    font-family: var(--ke-font-heading);
    margin: 4px 0;
}

.ws-target-hint {
    font-size: 12px;
    opacity: 0.7;
    font-style: italic;
}

.ws-arena {
    flex: 1;
    position: relative;
    overflow: hidden;
    min-height: 320px;
    background:
        radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(251, 191, 36, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, #fef7ff 0%, #f0f4ff 100%);
}

.ws-countdown {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    font-weight: 900;
    font-family: var(--ke-font-heading);
    color: var(--ke-primary);
    background: rgba(255, 255, 255, 0.9);
    z-index: 10;
    animation: countPulse 0.7s ease infinite;
}

@keyframes countPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
    }
}

.ws-word-btn {
    position: absolute;
    padding: 10px 18px;
    border: 3px solid var(--ke-primary);
    background: white;
    color: var(--ke-primary);
    font-size: 16px;
    font-weight: 700;
    font-family: var(--ke-font-heading);
    border-radius: var(--ke-radius-md);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
    animation: wordBounceIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    z-index: 5;
    user-select: none;
    -webkit-user-select: none;
    white-space: nowrap;
    opacity: 1;
}

.ws-word-btn:active {
    transform: scale(0.9);
}

.ws-word-btn.correct {
    background: var(--ke-success);
    border-color: var(--ke-success);
    color: white;
    animation: smashCorrect 0.5s ease;
    pointer-events: none;
}

.ws-word-btn.wrong {
    background: var(--ke-error);
    border-color: var(--ke-error);
    color: white;
    animation: incorrectShake 0.4s ease;
}

.ws-word-btn.fade-out {
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.3s ease;
}

@keyframes wordBounceIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    60% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes smashCorrect {
    0% {
        transform: scale(1);
    }

    30% {
        transform: scale(1.4) rotate(-5deg);
    }

    60% {
        transform: scale(0.8) rotate(3deg);
    }

    100% {
        transform: scale(0);
        opacity: 0;
    }
}

/* Particles */
.ws-particle {
    position: fixed;
    font-size: 20px;
    z-index: 100;
    pointer-events: none;
    animation: particleFly 0.6s ease-out forwards;
}

@keyframes particleFly {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }

    100% {
        transform: translate(var(--dx), var(--dy)) scale(0.3);
        opacity: 0;
    }
}

/* Feedback */
.ws-feedback {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 20px;
    border-radius: var(--ke-radius-md);
    font-size: 14px;
    font-weight: 700;
    z-index: 20;
    display: none;
    animation: feedbackSlide 0.3s ease;
    white-space: nowrap;
}

.ws-feedback.correct {
    background: #ecfdf5;
    color: var(--ke-success);
    border: 2px solid var(--ke-success);
}

.ws-feedback.wrong {
    background: #fff1f2;
    color: var(--ke-error);
    border: 2px solid var(--ke-error);
}

@keyframes feedbackSlide {
    from {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}