/* =========================================
   1. VARIABLES & RESET (Cấu hình chung)
   ========================================= */
:root {
    /* Màu sắc chủ đạo */
    --primary: #4F46E5;
    --primary-light: #EEF2FF;
    --bg: #F8FAFC;
    --surface: #FFFFFF;

    /* Màu văn bản */
    --text-main: #1E293B;
    --text-sub: #64748B;

    /* Trạng thái */
    --success: #10B981;
    --error: #EF4444;

    /* Hệ thống RPG (Trứng -> Kim cương) */
    --egg-color: #F59E0B;
    --egg-bg: #FFF7ED;
    --sprout-color: #10B981;
    --sprout-bg: #ECFDF5;
    --tree-color: #3B82F6;
    --tree-bg: #EFF6FF;
    --diamond-color: #8B5CF6;
    --diamond-bg: #F3E8FF;

    /* Hiệu ứng bóng đổ (Soft UI) */
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    padding-bottom: 90px;
    /* Chừa chỗ cho menu dưới */
    overflow-x: hidden;
}

main {
    padding: 20px;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeIn 0.4s ease;
    /* Hiệu ứng hiện trang */
}

/* FIX QUAN TRỌNG: Dùng margin-top thay vì transform để không làm hỏng vị trí fixed của con */
@keyframes fadeIn {
    from {
        opacity: 0;
        margin-top: 10px;
    }

    to {
        opacity: 1;
        margin-top: 0;
    }
}

/* =========================================
   2. HEADER & NAVIGATION (Menu trên/dưới)
   ========================================= */
.header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

/* Menu dưới cùng (Fixed Bottom) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--surface);
    border-top: 1px solid #F1F5F9;
    display: flex;
    justify-content: space-around;
    padding: 10px 0 25px 0;
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #94A3B8;
    font-size: 0.65rem;
    cursor: pointer;
    flex: 1;
    transition: color 0.2s;
}

.nav-item i {
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.nav-item.active {
    color: var(--primary);
}

/* =========================================
   3. TAB HOME (Trang chủ & RPG Charts)
   ========================================= */
.home-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.user-avatar {
    width: 45px;
    height: 45px;
    background: #E0E7FF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: bold;
    font-size: 1.2rem;
    border: 2px solid white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Biểu đồ RPG dạng ống (Capsule Chart) */
.rpg-chart-card {
    background: var(--surface);
    padding: 25px 20px;
    border-radius: 24px;
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.02);
}

.rpg-chart-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    height: 160px;
    padding: 0 10px;
    margin-top: 20px;
    z-index: 1;
    position: relative;
}

.rpg-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    flex: 1;
    cursor: pointer;
    transition: transform 0.2s;
}

.rpg-col:active {
    transform: scale(0.95);
}

.rpg-bar-track {
    width: 28px;
    height: 110px;
    background: #F1F5F9;
    border-radius: 30px;
    overflow: hidden;
    position: relative;
    margin-bottom: 12px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.05);
}

.rpg-bar-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 30px;
    transition: height 1s cubic-bezier(0.34, 1.56, 0.64, 1);
    min-height: 0px;
}

.rpg-icon-box {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border-radius: 50%;
    background: white;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #F1F5F9;
}

/* Tiêu đề section */
.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-sub);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* =========================================
   4. TAB TOPICS (Danh sách chủ đề)
   ========================================= */
.topic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    padding-bottom: 20px;
}

.topic-tile {
    background: var(--surface);
    border-radius: 20px;
    padding: 20px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid #F1F5F9;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    cursor: pointer;
    transition: transform 0.2s;
}

.topic-tile:active {
    transform: scale(0.96);
}

.tile-icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 12px;
    background: #F1F5F9;
    color: #64748B;
}

.topic-card {
    background: var(--surface);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 15px;
    border: 1px solid #F1F5F9;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
    cursor: pointer;
    transition: 0.2s;
}

.topic-card:active {
    transform: scale(0.98);
    background: #F8FAFC;
}

/* =========================================
   5. LEARNING (Flashcard & Quiz)
   ========================================= */
.lesson-container {
    padding: 20px;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

/* Flashcard 3D */
.flashcard-scene {
    width: 100%;
    height: 400px;
    perspective: 1200px;
    margin-bottom: 25px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
    transform-style: preserve-3d;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-radius: 24px;
}

.flashcard-scene.is-flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 25px;
    background: white;
    border: 1px solid #F1F5F9;
    overflow: hidden;
}

.flashcard-front {
    background: linear-gradient(145deg, #ffffff, #f8fafc);
}

.flashcard-back {
    transform: rotateY(180deg);
    background: #ffffff;
    padding-top: 40px;
    padding-bottom: 40px;
}

.card-word {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 10px;
    line-height: 1.1;
}

.card-ipa {
    font-family: 'Times New Roman', serif;
    font-style: italic;
    color: #64748B;
    font-size: 1.1rem;
    background: #F1F5F9;
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.bg-icon-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    font-size: 10rem;
    color: var(--primary);
    opacity: 0.03;
    transform: rotate(15deg);
    pointer-events: none;
}

.btn-card-audio {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-card-audio:active {
    transform: scale(0.9);
}

/* Quiz Styles */
.lesson-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    text-align: center;
    border: 1px solid #F1F5F9;
    animation: slideUp 0.4s ease;
}

.quiz-word {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin: 10px 0;
}

.quiz-options-grid {
    display: grid;
    gap: 15px;
}

.quiz-opt-btn {
    padding: 18px;
    border: 2px solid #E2E8F0;
    background: white;
    border-radius: 15px;
    font-size: 1rem;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.quiz-opt-btn:active {
    transform: scale(0.98);
}

.quiz-opt-btn.correct {
    background: #D1FAE5;
    border-color: #10B981;
    color: #065F46;
}

.quiz-opt-btn.wrong {
    background: #FEE2E2;
    border-color: #EF4444;
    color: #991B1B;
}

/* =========================================
   6. REVIEW & COLLECTION (Sổ tay & Ôn tập)
   ========================================= */
.word-row {
    background: white;
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 12px;
    border: 1px solid #F1F5F9;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02);
    cursor: pointer;
}

.word-row:active {
    transform: scale(0.98);
}

.stat-badge {
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    white-space: nowrap;
}

/* Thanh tìm kiếm dính (Sticky) */
.sticky-header {
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
    padding-bottom: 10px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 12px 15px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    margin-bottom: 12px;
}

.search-box input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 1rem;
    color: var(--text-main);
    background: transparent;
}

/* =========================================
   7. SETTINGS & PROFILE (Cài đặt)
   ========================================= */
.setting-card {
    background: var(--surface);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #F1F5F9;
    margin-bottom: 20px;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid #F1F5F9;
    cursor: pointer;
}

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

.st-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    margin-right: 15px;
}

.st-left {
    display: flex;
    align-items: center;
    flex: 1;
}

.st-text h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
}

.st-text p {
    margin: 2px 0 0 0;
    font-size: 0.8rem;
    color: var(--text-sub);
}

/* --- Các thành phần Form trong Settings --- */
/* Công tắc (Switch) */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #CBD5E1;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(24px);
}

/* Thanh kéo (Range) */
.speed-slider {
    width: 100px;
    accent-color: var(--primary);
    cursor: pointer;
    height: 4px;
}

/* Nút chọn giọng */
.voice-trigger-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    padding: 5px 0;
}

.voice-flag {
    font-size: 1.4rem;
}

/* Avatar Grid */
.avatar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.avatar-option {
    width: 60px;
    height: 60px;
    background: #F8FAFC;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: 0.2s;
}

.avatar-option.selected {
    background: #EEF2FF;
    border-color: var(--primary);
    transform: scale(1.1);
}

/* =========================================
   8. MODALS & OVERLAYS (Cửa sổ bật lên)
   ========================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s;
    backdrop-filter: blur(4px);
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    background: var(--surface);
    width: 85%;
    max-width: 350px;
    padding: 25px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    transform: scale(0.9);
    transition: 0.3s;
}

.modal-overlay.show .modal-box {
    transform: scale(1);
}

.modal-input {
    width: 100%;
    padding: 12px;
    border: 2px solid #E2E8F0;
    border-radius: 12px;
    margin-bottom: 20px;
    outline: none;
    font-size: 1rem;
}

.modal-actions {
    display: flex;
    gap: 10px;
}

.btn-modal {
    flex: 1;
    padding: 12px;
    border-radius: 12px;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

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

.btn-cancel {
    background: #F1F5F9;
    color: #64748B;
}

/* Voice Selection Sheet (Trượt từ dưới lên) */
.voice-sheet-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s;
    backdrop-filter: blur(2px);
}

.voice-sheet-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.voice-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
    border-radius: 24px 24px 0 0;
    padding: 25px 20px 40px 20px;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 0 -5px 30px rgba(0, 0, 0, 0.15);
    z-index: 2001;
}

.voice-sheet-overlay.show .voice-sheet {
    transform: translateY(0);
}

.voice-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-radius: 16px;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    margin-bottom: 12px;
    cursor: pointer;
    transition: 0.2s;
}

.voice-option.selected {
    border-color: var(--primary);
    background: #EEF2FF;
    box-shadow: 0 0 0 2px var(--primary-light);
}

.v-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.v-name {
    font-weight: 700;
    color: var(--text-main);
}

.v-check {
    color: var(--primary);
    opacity: 0;
    transform: scale(0.5);
    transition: 0.2s;
    font-size: 1.2rem;
}

.voice-option.selected .v-check {
    opacity: 1;
    transform: scale(1);
}

/* Result Sheet (Kết quả Quiz) */
.result-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
    z-index: 2000;
    border-radius: 24px 24px 0 0;
    box-shadow: 0 -5px 30px rgba(0, 0, 0, 0.15);
    transform: translateY(110%);
    transition: transform 0.3s;
    padding: 20px 20px 30px 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.result-sheet.show {
    transform: translateY(0);
}

.result-sheet.correct {
    border-top: 5px solid #10B981;
}

.result-sheet.wrong {
    border-top: 5px solid #EF4444;
}

.btn-sheet-action {
    width: 100%;
    padding: 16px;
    border-radius: 16px;
    border: none;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    color: white;
}

/* Word Detail Modal (Chi tiết từ) */
.word-detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s;
    backdrop-filter: blur(8px);
}

.word-detail-modal.show {
    opacity: 1;
    pointer-events: all;
}

.detail-card {
    background: white;
    width: 85%;
    max-width: 380px;
    border-radius: 30px;
    overflow: hidden;
    text-align: center;
    transform: scale(0.9);
    transition: 0.3s;
    position: relative;
}

.word-detail-modal.show .detail-card {
    transform: scale(1);
}

.detail-header {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    padding: 40px 20px 50px 20px;
    color: white;
    position: relative;
}

.btn-speak-floating {
    width: 60px;
    height: 60px;
    background: #F59E0B;
    color: white;
    border: 4px solid white;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* =========================================
   9. UTILITIES & DARK MODE
   ========================================= */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    background: white;
    color: #1E293B;
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
    border: 1px solid #F1F5F9;
    white-space: nowrap;
}

@keyframes slideDown {
    from {
        transform: translate(-50%, -50px);
        opacity: 0;
    }

    to {
        transform: translate(-50%, 0);
        opacity: 1;
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-5px);
    }

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

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

.progress-ring-circle {
    transition: stroke-dashoffset 1s ease-in-out;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

/* Dark Mode Overrides */
body.dark-mode {
    --bg: #111827;
    --surface: #1F2937;
    --text-main: #F3F4F6;
    --text-sub: #9CA3AF;
    --primary-light: #3730A3;
}

body.dark-mode .rpg-bar-track {
    background: #374151;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.2);
}

body.dark-mode .topic-card,
body.dark-mode .setting-card,
body.dark-mode .rpg-chart-card {
    border-color: #374151;
}

body.dark-mode .flashcard-front,
body.dark-mode .flashcard-back,
body.dark-mode .lesson-card {
    background: #1F2937;
    border-color: #374151;
}

body.dark-mode .quiz-opt-btn,
body.dark-mode .voice-option,
body.dark-mode .setting-row {
    background: #1F2937;
    border-color: #374151;
    color: #E5E7EB;
}

/* --- THỐNG KÊ MINI TAB CHỦ ĐỀ --- */
.topic-stats-bar {
    display: flex;
    align-items: center;
    justify-content: space-around;
    background: linear-gradient(135deg, #6366F1, #8B5CF6); /* Tím Pro */
    border-radius: 16px;
    padding: 12px 0;
    margin-bottom: 20px;
    color: white;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
    position: relative;
    overflow: hidden;
}

/* Hiệu ứng ánh sáng trang trí */
.topic-stats-bar::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%);
    pointer-events: none;
}

.ts-item {
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 1;
}

.ts-icon {
    width: 40px; height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.3);
}

.ts-info {
    display: flex; flex-direction: column;
}

.ts-num {
    font-size: 1.1rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 3px;
}

.ts-label {
    font-size: 0.75rem;
    opacity: 0.9;
    font-weight: 500;
}

/* Vạch ngăn cách giữa */
.ts-divider {
    width: 1px;
    height: 30px;
    background: rgba(255,255,255,0.2);
}

/* --- GIAO DIỆN LƯỚI CHỦ ĐỀ (GRID LAYOUT) --- */
.topic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Chia 2 cột đều nhau */
    gap: 15px; /* Khoảng cách giữa các thẻ */
    padding-bottom: 20px;
}

.topic-tile {
    background: var(--surface);
    border-radius: 20px;
    padding: 20px 15px;
    display: flex;
    flex-direction: column; /* Xếp dọc: Icon trên, Chữ dưới */
    align-items: center;     /* Căn giữa toàn bộ */
    text-align: center;      /* Căn giữa văn bản */
    border: 1px solid #F1F5F9;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
    height: 100%; /* Đảm bảo các thẻ cao bằng nhau */
}

.topic-tile:active {
    transform: scale(0.96);
}

/* Icon to tròn, màu sắc */
.tile-icon-box {
    width: 60px; height: 60px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 12px;
    transition: transform 0.2s;
}

/* Tiêu đề ngắn gọn */
.tile-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
    line-height: 1.3;
}

/* Số lượng từ nhỏ bên dưới */
.tile-desc {
    font-size: 0.75rem;
    color: var(--text-sub);
    opacity: 0.8;
    display: -webkit-box;
    -webkit-line-clamp: 2; /* Chỉ hiện tối đa 2 dòng mô tả cho gọn */
    -webkit-box-orient: vertical;
    overflow: hidden;
}