/* ============================================
   True Buddhism Study — Styles
   Simple, fun, happy. Clean and readable.
   ============================================ */

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

:root {
    --color-primary: #4A90D9;
    --color-primary-dark: #3A73B5;
    --color-primary-light: #6BA8E8;
    --color-accent: #F5A623;
    --color-accent-dark: #D4891A;
    --color-success: #5CB85C;
    --color-success-dark: #4A9A4A;
    --color-bg: #F7F5F0;
    --color-bg-white: #FFFFFF;
    --color-bg-warm: #FDF8F0;
    --color-text: #3A3A3A;
    --color-text-light: #6B6B6B;
    --color-text-lighter: #999999;
    --color-border: #E5E0D8;
    --color-border-light: #F0EDE7;
    --color-shadow: rgba(0, 0, 0, 0.08);
    --color-shadow-hover: rgba(0, 0, 0, 0.14);
    --color-gold: #D4A843;
    --color-bronze: #CD7F32;
    --color-silver: #A8A8A8;
    --color-platinum: #7B68EE;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: 0.2s ease;
    --max-width: 1100px;
    --font: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4 {
    line-height: 1.3;
    font-weight: 700;
}

/* --- Header --- */
.app-header {
    background: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px var(--color-shadow);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 18px;
    font-weight: 800;
    color: var(--color-text);
}

.main-nav {
    display: flex;
    gap: 4px;
}

.nav-btn {
    background: none;
    border: none;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all var(--transition);
}

.nav-btn:hover {
    background: var(--color-border-light);
    color: var(--color-text);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    padding: 8px 20px 16px;
    gap: 4px;
    background: var(--color-bg-white);
    border-top: 1px solid var(--color-border-light);
}

.mobile-nav.open {
    display: flex;
}

.mobile-nav .nav-btn {
    text-align: left;
    padding: 10px 14px;
}

/* --- Main --- */
.app-main {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px 20px 48px;
    width: 100%;
}

.section {
    display: none;
}

.section.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Hero (Home) --- */
.hero {
    text-align: center;
    padding: 48px 0 40px;
}

.hero h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--color-text);
}

.hero .highlight {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 28px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
}

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

.hero-stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary);
}

.hero-stat-label {
    font-size: 13px;
    color: var(--color-text-lighter);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 217, 0.3);
}

.btn-success {
    background: var(--color-success);
    color: white;
}
.btn-success:hover {
    background: var(--color-success-dark);
}

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

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(--radius);
}

.btn-back {
    background: var(--color-bg);
    color: var(--color-text-light);
    margin-bottom: 20px;
}
.btn-back:hover {
    background: var(--color-border);
    color: var(--color-text);
}

/* --- Home Cards --- */
.home-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 16px;
}

.home-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}

.home-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: 0 8px 24px var(--color-shadow-hover);
    transform: translateY(-2px);
}

.home-card-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.home-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.home-card p {
    color: var(--color-text-light);
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.6;
}

.home-card-count {
    display: inline-block;
    background: var(--color-bg);
    color: var(--color-text-light);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
}

/* --- Section Headers --- */
.section-header {
    margin-bottom: 28px;
}

.section-header h2 {
    font-size: 26px;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 15px;
}

/* --- Video List --- */
.video-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.video-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: all var(--transition);
}

.video-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: 0 4px 16px var(--color-shadow);
    transform: translateY(-1px);
}

.video-card-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--color-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
    color: var(--color-text-light);
}

.video-card-number.completed {
    background: var(--color-success);
    color: white;
}

.video-card-info {
    flex: 1;
    min-width: 0;
}

.video-card-title {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 2px;
}

.video-card-subtitle {
    color: var(--color-text-lighter);
    font-size: 13px;
}

.video-card-badge {
    flex-shrink: 0;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}

.badge-completed {
    background: #E8F5E9;
    color: var(--color-success);
}

.badge-quiz {
    background: #FFF3E0;
    color: var(--color-accent-dark);
}

.badge-new {
    background: #E3F2FD;
    color: var(--color-primary);
}

/* --- Player --- */
.player-container {
    max-width: 800px;
    margin: 0 auto;
}

.player-title {
    font-size: 22px;
    margin-bottom: 20px;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius);
    margin-bottom: 24px;
    background: #000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.player-topics {
    margin-bottom: 32px;
}

.player-topics h4 {
    font-size: 15px;
    margin-bottom: 10px;
    color: var(--color-text-light);
}

.topics-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.topic-tag {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--color-text-light);
}

/* --- Quiz --- */
.quiz-section {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.quiz-header {
    text-align: center;
    margin-bottom: 24px;
}

.quiz-header h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.quiz-header p {
    color: var(--color-text-light);
    font-size: 14px;
}

.quiz-question {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border-light);
}

.quiz-question:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.quiz-question-text {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 12px;
    display: flex;
    gap: 8px;
}

.quiz-question-number {
    color: var(--color-primary);
    flex-shrink: 0;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-left: 24px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--color-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 14px;
}

.quiz-option:hover {
    background: var(--color-border-light);
    border-color: var(--color-border);
}

.quiz-option.selected {
    border-color: var(--color-primary);
    background: #E3F2FD;
}

.quiz-option.correct {
    border-color: var(--color-success);
    background: #E8F5E9;
}

.quiz-option.incorrect {
    border-color: #E53935;
    background: #FFEBEE;
}

.quiz-option-letter {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
    color: var(--color-text-light);
}

.quiz-option.selected .quiz-option-letter {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.quiz-option.correct .quiz-option-letter {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.quiz-option.incorrect .quiz-option-letter {
    background: #E53935;
    color: white;
    border-color: #E53935;
}

.quiz-tf-options {
    display: flex;
    gap: 12px;
    padding-left: 24px;
}

.quiz-tf-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    font-family: var(--font);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition);
    max-width: 200px;
}

.quiz-tf-btn:hover {
    border-color: var(--color-primary-light);
    background: #E3F2FD;
}

.quiz-tf-btn.selected {
    border-color: var(--color-primary);
    background: #E3F2FD;
    color: var(--color-primary);
}

.quiz-tf-btn.correct {
    border-color: var(--color-success);
    background: #E8F5E9;
    color: var(--color-success);
}

.quiz-tf-btn.incorrect {
    border-color: #E53935;
    background: #FFEBEE;
    color: #E53935;
}

.quiz-actions {
    text-align: center;
    margin-top: 24px;
}

.quiz-result {
    text-align: center;
    padding: 32px;
}

.quiz-result-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.quiz-result h3 {
    font-size: 22px;
    margin-bottom: 8px;
}

.quiz-result p {
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.quiz-result .award-earned {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #FFF8E1;
    border: 2px solid var(--color-accent);
    padding: 10px 20px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 16px;
    color: var(--color-accent-dark);
    margin-bottom: 20px;
}

.quiz-result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Temples --- */
.temple-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.temple-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 22px;
    transition: all var(--transition);
}

.temple-card:hover {
    box-shadow: 0 4px 16px var(--color-shadow);
    transform: translateY(-1px);
}

.temple-card-name {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 4px;
}

.temple-card-location {
    color: var(--color-text-light);
    font-size: 14px;
    margin-bottom: 12px;
}

.temple-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
}

.temple-head {
    border: 2px solid var(--color-accent);
    background: var(--color-bg-warm);
}

.temple-head .temple-card-name::before {
    content: '⭐ ';
}

/* --- Progress Dashboard --- */
.progress-dashboard {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.progress-status-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
}

.progress-status-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-lighter);
    margin-bottom: 8px;
}

.progress-status-level {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
}

.progress-status-level.level-basic { color: var(--color-bronze); }
.progress-status-level.level-informed { color: var(--color-silver); }
.progress-status-level.level-well-informed { color: var(--color-gold); }
.progress-status-level.level-very-well-informed { color: var(--color-platinum); }

.progress-bar-container {
    max-width: 400px;
    margin: 16px auto 0;
}

.progress-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-lighter);
    margin-bottom: 6px;
}

.progress-bar {
    height: 10px;
    background: var(--color-bg);
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    border-radius: 5px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transition: width 0.5s ease;
}

.progress-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.progress-section-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 22px;
}

.progress-section-card h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.progress-section-card .progress-section-stats {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 12px;
}

.progress-section-card .mini-bar {
    height: 6px;
    background: var(--color-bg);
    border-radius: 3px;
    overflow: hidden;
}

.progress-section-card .mini-bar-fill {
    height: 100%;
    background: var(--color-success);
    border-radius: 3px;
    transition: width 0.5s ease;
}

.progress-awards {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.progress-awards h3 {
    font-size: 18px;
    margin-bottom: 16px;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.award-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
}

.award-item.earned {
    background: #E8F5E9;
    color: var(--color-success-dark);
}

.award-item.locked {
    background: var(--color-bg);
    color: var(--color-text-lighter);
}

.award-icon {
    font-size: 18px;
}

.progress-reset {
    text-align: center;
    margin-top: 8px;
}

.btn-reset {
    background: none;
    border: none;
    color: var(--color-text-lighter);
    font-family: var(--font);
    font-size: 13px;
    cursor: pointer;
    padding: 8px 16px;
    transition: color var(--transition);
}

.btn-reset:hover {
    color: #E53935;
}

/* --- Footer --- */
.app-footer {
    background: var(--color-bg-white);
    border-top: 1px solid var(--color-border-light);
    padding: 24px 20px;
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    font-size: 13px;
    color: var(--color-text-lighter);
}

.footer-link {
    margin-top: 4px;
}

.footer-link a {
    font-weight: 600;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        gap: 20px;
    }

    .section-header h2 {
        font-size: 22px;
    }

    .video-card {
        padding: 14px 16px;
    }

    .video-card-badge {
        display: none;
    }

    .quiz-section {
        padding: 20px 16px;
    }

    .quiz-tf-options {
        flex-direction: column;
    }

    .quiz-tf-btn {
        max-width: none;
    }

    .player-title {
        font-size: 18px;
    }

    .temple-grid {
        grid-template-columns: 1fr;
    }

    .progress-sections {
        grid-template-columns: 1fr;
    }

    .awards-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header-inner {
        height: 56px;
    }

    .logo-text {
        font-size: 15px;
    }

    .logo-icon {
        font-size: 24px;
    }

    .app-main {
        padding: 16px 14px 40px;
    }

    .hero {
        padding: 32px 0 28px;
    }

    .hero h1 {
        font-size: 24px;
    }

    .home-sections {
        grid-template-columns: 1fr;
    }

    .btn-lg {
        padding: 12px 22px;
        font-size: 15px;
    }
}