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

:root {
    --bg:       #0d0d0d;
    --surface:  #151515;
    --surface2: #1c1c1c;
    --surface3: #252525;
    --border:   #2a2a2a;
    --border2:  #333;
    --green:    #2ecc71;
    --green-dk: #27ae60;
    --green-glow: rgba(46,204,113,0.15);
    --amber:    #f0a500;
    --blue:     #3b9eff;
    --red:      #e74c3c;
    --text:     #e8e8e8;
    --text-dim: #999;
    --text-muted: #666;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --radius: 10px;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.7;
    padding: 0;
    min-height: 100vh;
}

/* ===== LAYOUT ===== */
.page-wrap { max-width: 1140px; margin: 0 auto; padding: 24px 20px 100px; }

/* ===== HEADER ===== */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    padding: 28px 0 24px;
    border-bottom: 2px solid var(--green-dk);
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.header-title-block .lesson-label {
    font-size: 0.85rem;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 6px;
}

.header-title-block h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: #fff;
    line-height: 1.15;
    margin-bottom: 6px;
}

.header-title-block .subtitle { color: var(--text-dim); font-size: 1rem; }

.flag-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    padding: 10px 18px;
    font-size: 2.2rem;
}

.back-link {
    text-decoration: none;
    color: var(--text-dim);
    border: 1px solid var(--border2);
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: 0.2s;
    white-space: nowrap;
}
.back-link:hover { color: #fff; border-color: #fff; }

/* ===== NAVIGATION ===== */
.nav-strip {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.tab-btn {
    background: var(--surface2);
    border: 1px solid var(--border2);
    color: var(--text-dim);
    padding: 12px 22px;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.2s;
    white-space: nowrap;
}
.tab-btn:hover { background: var(--surface3); color: var(--text); border-color: #555; }
.tab-btn.active { background: var(--green-dk); color: #fff; border-color: var(--green-dk); box-shadow: 0 0 18px var(--green-glow); }

/* ===== SECTIONS ===== */
.section { display: none; animation: fadeUp 0.35s ease; }
.section.active { display: block; }

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

/* ===== CARDS & BOXES ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 4px solid var(--green-dk);
    border-radius: var(--radius);
    padding: 30px 32px;
    margin-bottom: 28px;
}
.card-amber { border-top-color: var(--amber); }
.card-blue  { border-top-color: var(--blue); }
.card-plain { border-top: 1px solid var(--border); }

.context-note {
    background: rgba(46,204,113,0.07);
    border-left: 4px solid var(--green);
    padding: 16px 20px;
    border-radius: 0 6px 6px 0;
    color: #ccc;
    font-size: 1.1rem;
    margin-bottom: 26px;
}

.tip-box {
    background: rgba(240,165,0,0.08);
    border: 1px solid rgba(240,165,0,0.3);
    border-left: 4px solid var(--amber);
    padding: 18px 22px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-top: 20px;
    font-size: 1.05rem;
}
.tip-box strong { color: var(--amber); }

.rule-box {
    background: #1a2a20;
    border: 1px solid #2a4a38;
    border-left: 4px solid var(--green);
    padding: 18px 22px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 16px 0;
    font-size: 1.1rem;
}

/* ===== HEADINGS ===== */
h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--green);
    border-bottom: 1px solid var(--border2);
    padding-bottom: 12px;
    margin-bottom: 22px;
}
h3 {
    color: var(--amber);
    font-size: 1.25rem;
    margin: 28px 0 14px;
    padding-left: 14px;
    border-left: 4px solid var(--amber);
}
p { font-size: 1.15rem; margin-bottom: 14px; }
strong { color: #fff; }
em { color: var(--green); font-style: normal; }

/* ===== VOCABULARY ===== */
.vocab-section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--green);
    font-weight: 700;
    padding: 6px 0 8px;
    border-bottom: 1px solid var(--border2);
    margin: 24px 0 10px;
}

.vocab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 10px;
}

.vocab-card {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: 0.2s;
}
.vocab-card:hover { background: #1c2e22; border-color: var(--green-dk); }

.vocab-en { font-weight: 700; font-size: 1.15rem; flex: 1; }
.vocab-bg { color: var(--text-dim); font-style: italic; font-size: 1rem; }

.speak-btn {
    background: none;
    border: 1px solid var(--border2);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px 8px;
    transition: 0.2s;
    color: var(--text-dim);
}
.speak-btn:hover { border-color: var(--green); background: var(--green-glow); color: #fff; }

/* ===== TABLES ===== */
.info-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--radius);
    overflow: hidden;
    font-size: 1.1rem;
    margin-bottom: 20px;
}
.info-table th {
    background: #111;
    color: var(--green);
    text-align: left;
    padding: 14px 18px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.info-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
.info-table tr:last-child td { border-bottom: none; }
.info-table tr:hover td { background: var(--surface2); }
.info-table td:first-child { font-weight: 700; color: var(--amber); }

/* ===== PHRASE BLOCKS ===== */
.phrase-list { list-style: none; padding: 0; }
.phrase-list li {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 1.15rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.phrase-list li:last-child { border-bottom: none; }
.phrase-list li::before {
    content: "▶";
    color: var(--green);
    font-size: 0.7rem;
    margin-top: 6px;
    flex-shrink: 0;
}

/* ===== COUNTRY BANNER ===== */
.country-banner {
    background: linear-gradient(135deg, #0d1f15 0%, #0a1a0d 60%, #0d0d0d 100%);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    padding: 32px 36px;
    margin-bottom: 28px;
    position: relative;
    overflow: hidden;
}
.country-banner::before {
    content: "🇧🇬";
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 5rem;
    opacity: 0.3;
}
.country-stat-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.stat-chip {
    background: var(--surface3);
    border: 1px solid var(--border2);
    border-radius: 6px;
    padding: 8px 16px;
    font-size: 1rem;
}
.stat-chip span { color: var(--green); font-weight: 700; margin-right: 6px; }

/* ===== MODEL PHRASE ===== */
.model-phrase {
    background: var(--surface2);
    border-left: 4px solid var(--green);
    border-radius: 0 8px 8px 0;
    padding: 14px 18px;
    margin: 10px 0;
    font-size: 1.15rem;
}
.model-phrase em { color: var(--green); font-style: normal; font-weight: 700; }

/* ===== GEO GRID ===== */
.geo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}
@media (max-width: 700px) { .geo-grid { grid-template-columns: 1fr; } }
.geo-fact {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 18px 20px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.geo-icon { font-size: 1.8rem; flex-shrink: 0; margin-top: 2px; }
.geo-label { font-weight: 700; color: var(--amber); font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.5px; }
.geo-value { font-size: 1.1rem; color: var(--text); margin-top: 2px; }

/* ===== GRAMMAR TABLE ===== */
.grammar-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--radius);
    overflow: hidden;
    font-size: 1.05rem;
    margin-bottom: 20px;
    background: #181818;
}
.grammar-table th {
    background: #111;
    color: var(--green);
    text-align: left;
    padding: 12px 16px;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.grammar-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
.grammar-table tr:last-child td { border-bottom: none; }
.grammar-table td:first-child { color: var(--green); font-weight: 700; font-family: 'Courier New', monospace; }

/* ===== TRADITION CARDS ===== */
.tradition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 22px;
    margin-top: 20px;
}
.tradition-card {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}
.tradition-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(0,0,0,0.4); }
.tradition-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    background: var(--surface3);
}
.tradition-body { padding: 20px; }
.tradition-body h3 { margin-top: 0; border-left: none; padding-left: 0; font-size: 1.2rem; }
.tradition-body p { font-size: 1.05rem; color: #ccc; line-height: 1.65; }
.tradition-tag {
    display: inline-block;
    background: var(--green-glow);
    border: 1px solid rgba(46,204,113,0.3);
    color: var(--green);
    font-size: 0.8rem;
    padding: 3px 10px;
    border-radius: 20px;
    margin-bottom: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== HOLIDAY READING CARDS ===== */
.holiday-reading-card {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    margin-bottom: 28px;
    overflow: hidden;
}
.holiday-reading-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border2);
    display: flex;
    align-items: center;
    gap: 16px;
    background: #191919;
}
.holiday-reading-date {
    font-size: 0.8rem;
    color: var(--green);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    white-space: nowrap;
}
.holiday-reading-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: #fff;
}
.holiday-reading-body { padding: 24px; }
.holiday-reading-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 20px;
    border-left: 3px solid var(--border2);
    padding-left: 18px;
}
.holiday-questions { margin-top: 18px; }
.holiday-q-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--amber);
    font-weight: 700;
    margin-bottom: 14px;
}
.holiday-q-item {
    background: var(--surface3);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 18px;
    margin-bottom: 12px;
}
.hq-text { font-size: 1.05rem; margin-bottom: 12px; color: var(--text); }
.hq-options { display: flex; gap: 10px; flex-wrap: wrap; }
.hq-btn {
    background: var(--surface2);
    border: 1px solid var(--border2);
    color: var(--text);
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: 0.2s;
}
.hq-btn:hover { background: #333; border-color: #666; }
.hq-btn.correct { background: var(--green-dk); border-color: var(--green); color: #fff; }
.hq-btn.wrong { background: #7a1f1f; border-color: var(--red); color: #fff; }
.hq-feedback {
    font-size: 0.95rem;
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: 5px;
    display: none;
}
.hq-feedback.show { display: block; }
.hq-feedback.ok { background: rgba(46,204,113,0.1); color: var(--green); border: 1px solid rgba(46,204,113,0.3); }
.hq-feedback.bad { background: rgba(231,76,60,0.1); color: #ff6b6b; border: 1px solid rgba(231,76,60,0.3); }

/* ===== VIDEOS ===== */
.video-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 30px;
}
@media (max-width: 750px) { .video-grid { grid-template-columns: 1fr; } }
.video-slot {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    overflow: hidden;
}
.video-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.video-header strong { font-size: 1.05rem; color: #fff; }
.video-header span { font-size: 0.85rem; color: var(--text-dim); }
.video-frame {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    background: #000;
}
.video-frame iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: 0;
}

/* ===== LISTEN CARDS ===== */
.listen-card {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 14px;
    transition: 0.2s;
    flex-wrap: wrap;
}
.listen-card:hover { border-color: var(--green-dk); }
.listen-icon { font-size: 2rem; flex-shrink: 0; }
.listen-text { flex: 1; }
.listen-text strong { font-size: 1.1rem; display: block; color: #fff; }
.listen-text span { font-size: 1rem; color: var(--text-dim); }
.listen-btn {
    background: var(--green-dk);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 22px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: 0.2s;
}
.listen-btn:hover { background: var(--green); }

/* ===== DRILLS ===== */
.drill-block {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 22px;
}
.drill-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--amber);
    font-weight: 700;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border2);
}
.drill-item {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    margin-bottom: 12px;
    font-size: 1.1rem;
}
.q-text { margin-bottom: 12px; font-size: 1.1rem; }
.options-row { display: flex; gap: 10px; flex-wrap: wrap; }
.opt-btn {
    background: var(--surface3);
    border: 1px solid var(--border2);
    color: var(--text);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.05rem;
    font-family: var(--font-body);
    transition: 0.2s;
}
.opt-btn:hover { background: #333; border-color: #666; }
.opt-btn.correct { background: var(--green-dk); border-color: var(--green); color: #fff; }
.opt-btn.wrong   { background: #7a1f1f; border-color: var(--red); color: #fff; }

.text-answer-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.quiz-input {
    background: var(--surface3);
    border: 1px solid var(--border2);
    color: #fff;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 1.05rem;
    font-family: var(--font-body);
    width: 200px;
}
.quiz-input:focus { outline: none; border-color: var(--blue); }
.check-btn {
    background: var(--amber);
    color: #000;
    border: none;
    border-radius: 6px;
    padding: 10px 22px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    font-family: var(--font-body);
    transition: 0.2s;
}
.check-btn:hover { background: #d48f00; }
.feedback { font-weight: 700; font-size: 1.1rem; margin-left: 6px; }
.feedback.ok  { color: var(--green); }
.feedback.bad { color: var(--red); }

/* ===== PROGRESS BAR ===== */
.progress-wrap { margin-bottom: 28px; }
.progress-label { display: flex; justify-content: space-between; font-size: 0.9rem; color: var(--text-dim); margin-bottom: 6px; }
.progress-bar { height: 6px; background: var(--border2); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--green-dk), var(--green)); border-radius: 3px; transition: width 0.5s ease; }

/* ===== VIDEO REFLECTION ===== */
.video-reflection {
    background: #181818;
    border: 1px solid var(--border2);
    border-top: 3px solid var(--amber);
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 22px 24px;
    margin-bottom: 8px;
}
.vr-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--amber);
    font-weight: 700;
    margin-bottom: 18px;
}
.vr-question { margin-bottom: 16px; }
.vr-q-text {
    display: block;
    font-size: 1.05rem;
    color: var(--text);
    margin-bottom: 8px;
    font-weight: 600;
}
.vr-input {
    width: 100%;
    background: var(--surface3);
    border: 1px solid var(--border2);
    border-radius: 6px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 1.05rem;
    padding: 12px 14px;
    resize: vertical;
    min-height: 70px;
    line-height: 1.6;
    transition: border-color 0.2s;
}
.vr-input:focus { outline: none; border-color: var(--amber); }
.vr-save-btn {
    background: var(--surface2);
    border: 1px solid var(--amber);
    color: var(--amber);
    border-radius: 6px;
    padding: 10px 22px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s;
    margin-top: 6px;
}
.vr-save-btn:hover { background: var(--amber); color: #000; }
.vr-saved-msg {
    font-size: 0.95rem;
    color: var(--green);
    margin-top: 8px;
    min-height: 22px;
    font-weight: 600;
}

/* ===== SCROLL HINT ===== */
.scroll-hint { text-align: center; color: var(--text-muted); font-size: 0.85rem; margin-top: 10px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .page-wrap { padding: 16px 14px 80px; }
    .card { padding: 22px 18px; }
    .tab-btn { padding: 10px 14px; font-size: 0.9rem; }
    .vocab-grid { grid-template-columns: 1fr; }
    .tradition-grid { grid-template-columns: 1fr; }
    h2 { font-size: 1.4rem; }
    p { font-size: 1.05rem; }
    .hq-options { flex-direction: column; }
    .video-grid { grid-template-columns: 1fr; }
}