/**
 * Bảng ghép vần tiếng Việt Lớp 1 - Gamification / Duolingo Style
 * CungConHoc.com
 */

:root {
    --duo-green: #58cc02;
    --duo-green-shadow: #58a700;
    --duo-green-light: #d7ffb8;
    --duo-blue: #1cb0f6;
    --duo-blue-shadow: #1899d6;
    --duo-blue-light: #ddf4ff;
    --duo-yellow: #ffc800;
    --duo-yellow-shadow: #e5a500;
    --duo-yellow-light: #fff5c0;
    --duo-purple: #ce82ff;
    --duo-purple-shadow: #af5bdf;
    --duo-purple-light: #f5e3ff;
    --duo-red: #ff4b4b;
    --duo-red-shadow: #ea2b2b;
    --duo-red-light: #ffdfe0;
    --duo-border: #e5e7eb;
    --duo-border-dark: #d1d5db;
    --duo-card-bg: #ffffff;
    --duo-page-bg: #f7f9fa;
    --duo-text: #3c3c3c;
    --duo-text-muted: #777777;
    --duo-radius: 18px;
    --duo-font: "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body.page-id-1501 #header,
body.page-id-1501 .header-wrapper,
body.page-id-1501 #footer,
body.page-id-1501 .footer-wrapper {
    display: none !important;
}

body.page-id-1501 #main,
body.page-id-1501 #content,
body.page-id-1501 .page-wrapper,
body.page-id-1501 .content-area,
body.page-id-1501 .entry-content {
    padding: 0 !important;
    margin: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    background: transparent !important;
}

.cch-bgv-wrapper {
    font-family: var(--duo-font);
    color: var(--duo-text);
    background: var(--duo-page-bg);
    padding: 24px 16px 80px;
    min-height: 100vh;
    box-sizing: border-box;
}

.cch-bgv-container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Header Banner */
.cch-bgv-header {
    background: linear-gradient(135deg, #58cc02 0%, #23ac0e 100%);
    border-radius: 24px;
    border-bottom: 6px solid #1c8808;
    padding: 24px 28px;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
    box-shadow: 0 10px 25px rgba(88, 204, 2, 0.25);
}

.cch-bgv-header-content h1 {
    font-size: 28px;
    font-weight: 900;
    margin: 0 0 6px;
    color: #fff;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.cch-bgv-header-content p {
    margin: 0;
    font-size: 15px;
    opacity: 0.95;
    font-weight: 600;
}

.cch-bgv-stats-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.cch-bgv-stat-pill {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 14px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    backdrop-filter: blur(4px);
}

/* Howto Guide Box & Sample Words */
.cch-bgv-howto-box {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-bottom: 5px solid #d1d5db;
    border-radius: 24px;
    padding: 20px 24px;
    margin-bottom: 24px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.cch-bgv-guide-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.cch-bgv-step {
    display: flex;
    align-items: center;
    gap: 10px;
}

.cch-bgv-step .step-num {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    background: #eff6ff;
    color: #2563eb;
    font-weight: 900;
    font-size: 15px;
    display: grid;
    place-items: center;
    border: 1.5px solid #bfdbfe;
    flex-shrink: 0;
}

.cch-bgv-step.is-highlight .step-num {
    background: #f0fdf4;
    color: #16a34a;
    border-color: #bbf7d0;
}

.cch-bgv-step strong {
    display: block;
    font-size: 14px;
    font-weight: 900;
    color: #1f2937;
    line-height: 1.2;
}

.cch-bgv-step small {
    display: block;
    font-size: 12px;
    color: #6b7280;
    font-weight: 700;
    margin-top: 2px;
}

.step-arrow {
    color: #cbd5e1;
    font-weight: 900;
    font-size: 14px;
}

.cch-bgv-samples-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid #f1f5f9;
    flex-wrap: wrap;
}

.samples-label {
    font-size: 13px;
    font-weight: 900;
    color: #374151;
    white-space: nowrap;
}

.cch-bgv-sample-chips {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cch-bgv-sample-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-bottom: 3px solid #cbd5e1;
    border-radius: 999px;
    padding: 5px 12px;
    font-size: 13px;
    font-weight: 800;
    color: #334155;
    cursor: pointer;
    transition: transform .08s ease, background .1s ease, border-color .1s ease;
}

.cch-bgv-sample-chip:hover {
    background: #eff6ff;
    color: #1d4ed8;
    border-color: #93c5fd;
    transform: translateY(-2px);
}

.cch-bgv-sample-chip:active {
    transform: translateY(2px);
    border-bottom-width: 1px;
}

/* Duolingo Main Board Grid */
.cch-bgv-main-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 24px;
    align-items: start;
}

@media (max-width: 900px) {
    .cch-bgv-main-grid {
        grid-template-columns: 1fr;
    }
}

/* 3D Button Components */
.cch-duo-btn {
    font-family: var(--duo-font);
    font-weight: 800;
    border-radius: 14px;
    border: 2px solid var(--duo-border-dark);
    border-bottom: 4px solid var(--duo-border-dark);
    background: #fff;
    color: var(--duo-text);
    padding: 10px 14px;
    cursor: pointer;
    transition: transform 0.08s ease, border-bottom 0.08s ease, background-color 0.1s ease;
    user-select: none;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.cch-duo-btn:hover:not(:disabled) {
    background: #f7f9fa;
}

.cch-duo-btn:active:not(:disabled) {
    transform: translateY(2px);
    border-bottom-width: 2px;
}

.cch-duo-btn.is-active {
    background: var(--duo-blue);
    color: #fff;
    border-color: var(--duo-blue-shadow);
    border-bottom-color: var(--duo-blue-shadow);
}

.cch-duo-btn.is-active-green {
    background: var(--duo-green);
    color: #fff;
    border-color: var(--duo-green-shadow);
    border-bottom-color: var(--duo-green-shadow);
}

.cch-duo-btn.is-active-purple {
    background: var(--duo-purple);
    color: #fff;
    border-color: var(--duo-purple-shadow);
    border-bottom-color: var(--duo-purple-shadow);
}

.cch-duo-btn.is-active-yellow {
    background: var(--duo-yellow);
    color: #2b2b2b;
    border-color: var(--duo-yellow-shadow);
    border-bottom-color: var(--duo-yellow-shadow);
}

.cch-duo-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    background: #e5e7eb;
    border-color: #d1d5db;
    border-bottom-color: #9ca3af;
    transform: none !important;
}

/* Sections & Cards */
.cch-bgv-card {
    background: var(--duo-card-bg);
    border: 2px solid var(--duo-border);
    border-bottom: 5px solid var(--duo-border-dark);
    border-radius: var(--duo-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.cch-bgv-card-title {
    font-size: 17px;
    font-weight: 800;
    margin: 0 0 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #1f2937;
}

.cch-bgv-card-title span.badge {
    font-size: 12px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
    background: #f3f4f6;
    color: #4b5563;
}

/* Initial Consonants Grid */
.cch-bgv-am-dau-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(54px, 1fr));
    gap: 8px;
}

.cch-bgv-am-btn {
    font-size: 16px;
    padding: 8px 4px;
    min-height: 44px;
}

/* Vowel / Rhymes Tabs */
.cch-bgv-van-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 14px;
    scrollbar-width: thin;
}

.cch-bgv-tab-btn {
    font-size: 13px;
    padding: 6px 12px;
    white-space: nowrap;
    border-radius: 999px;
}

.cch-bgv-van-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(62px, 1fr));
    gap: 8px;
    max-height: 280px;
    overflow-y: auto;
    padding: 4px;
    scrollbar-width: thin;
}

.cch-bgv-van-btn {
    font-size: 16px;
    padding: 8px 4px;
    min-height: 44px;
}

/* Tones Grid */
.cch-bgv-tones-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
}

@media (max-width: 600px) {
    .cch-bgv-tones-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.cch-bgv-tone-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 4px;
    gap: 2px;
}

.cch-bgv-tone-btn .symbol {
    font-size: 20px;
    font-weight: 900;
    line-height: 1;
}

.cch-bgv-tone-btn .label {
    font-size: 12px;
    font-weight: 700;
}

/* Spelling Stage Card (Right Column on Desktop, Sticky) */
.cch-bgv-stage-col {
    position: sticky;
    top: 80px;
}

.cch-bgv-stage-card {
    background: #fff;
    border: 3px solid var(--duo-border);
    border-bottom: 6px solid var(--duo-border-dark);
    border-radius: 24px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
}

.cch-bgv-stage-formula {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 15px;
    font-weight: 800;
    color: var(--duo-text-muted);
}

.cch-bgv-formula-chip {
    padding: 4px 10px;
    border-radius: 10px;
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
}

.cch-bgv-formula-chip.is-am {
    background: var(--duo-blue-light);
    color: var(--duo-blue-shadow);
    border-color: #b9e6fe;
}

.cch-bgv-formula-chip.is-van {
    background: var(--duo-green-light);
    color: var(--duo-green-shadow);
    border-color: #bbf793;
}

.cch-bgv-formula-chip.is-thanh {
    background: var(--duo-purple-light);
    color: var(--duo-purple-shadow);
    border-color: #ebd0fc;
}

/* Big Syllable Display */
.cch-bgv-syllable-display {
    font-size: 64px;
    font-weight: 900;
    line-height: 1.1;
    color: #1e293b;
    margin: 12px 0 16px;
    letter-spacing: 0.5px;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 4px 0 rgba(0, 0, 0, 0.06);
    transition: transform 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cch-bgv-syllable-display.pop-animate {
    animation: cch-pop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes cch-pop {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

/* Spelling Audio Buttons */
.cch-bgv-audio-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.cch-bgv-play-spell-btn {
    background: var(--duo-green);
    border-color: var(--duo-green-shadow);
    border-bottom: 5px solid var(--duo-green-shadow);
    color: #fff;
    font-size: 17px;
    font-weight: 800;
    padding: 14px 20px;
    border-radius: 16px;
    width: 100%;
}

.cch-bgv-play-spell-btn:hover {
    background: #61e002;
}

.cch-bgv-play-word-btn {
    background: #fff;
    border: 2px solid var(--duo-border-dark);
    border-bottom: 4px solid var(--duo-border-dark);
    color: #4b5563;
    font-size: 14px;
    font-weight: 700;
    padding: 10px 16px;
    border-radius: 14px;
    width: 100%;
}

/* Meaning / Vocabulary Card */
.cch-bgv-meaning-card {
    background: #fff9e6;
    border: 2px dashed #fcd34d;
    border-radius: 18px;
    padding: 16px;
    text-align: center;
    margin-top: 14px;
    transition: all 0.2s ease;
}

.cch-bgv-meaning-card .emoji {
    font-size: 38px;
    display: block;
    margin-bottom: 6px;
}

.cch-bgv-meaning-card .word-meaning {
    font-size: 16px;
    font-weight: 800;
    color: #92400e;
    margin: 0 0 4px;
}

.cch-bgv-meaning-card .sample-sentence {
    font-size: 13px;
    font-style: italic;
    color: #78350f;
    margin: 0;
}

/* Spelling Rule Alert */
.cch-bgv-rule-box {
    background: #fff1f2;
    border: 2px solid #fecdd3;
    border-radius: 14px;
    padding: 12px 14px;
    margin-top: 14px;
    font-size: 13px;
    font-weight: 700;
    color: #be123c;
    text-align: left;
    display: none;
}

.cch-bgv-rule-box.is-visible {
    display: block;
    animation: fadeIn 0.2s ease;
}

/* Floating XP Toast */
.cch-bgv-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1f2937;
    color: #fff;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 800;
    font-size: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    z-index: 10000;
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cch-bgv-toast.is-show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
    .cch-bgv-wrapper {
        padding: 12px 10px 80px;
    }
    
    .cch-bgv-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 18px 20px;
    }
    
    .cch-bgv-header-content h1 {
        font-size: 22px;
    }
    
    .cch-bgv-stage-col {
        position: static;
        margin-top: 20px;
    }
}

/* Mobile Bottom Navigation Dock (Duolingo Style) */
.cch-mobile-dock {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.98);
    border-top: 2px solid #e5e7eb;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.06);
    z-index: 9999;
    backdrop-filter: blur(10px);
    align-items: center;
    justify-content: space-around;
    padding: 0 8px;
}

@media (max-width: 768px) {
    .cch-mobile-dock {
        display: flex;
    }
}

.cch-mobile-dock a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: #6b7280;
    text-decoration: none;
    font-size: 11px;
    font-weight: 800;
    padding: 6px 10px;
    border-radius: 12px;
    transition: all 0.15s ease;
}

.cch-mobile-dock a .icon {
    font-size: 20px;
    line-height: 1;
}

.cch-mobile-dock a.is-active {
    color: #58cc02;
}

.cch-mobile-dock a.is-highlight-dock {
    color: #9333ea;
}

.cch-mobile-dock a:active {
    transform: scale(0.92);
}