/* --- CSS VARIABLES & THEMING --- */
:root {
    --bg-page: #121212;
    --bg-card: #1e1e1e;
    --bg-card-alt: #252525;
    --bg-panel: #2a2a2a;

    --text-main: #e0e0e0;
    --text-muted: #aaaaaa;

    --primary: #27ae60;
    --primary-light: #2ecc71;
    --accent: #f39c12;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --info: #3498db;
    --warning: #f1c40f;
    --purple: #9b59b6;
    --teal: #1abc9c;

    --border-color: #333333;
    --border-light: #444444;

    --radius-sm: 4px;
    --radius-md: 8px;

    --transition-speed: 0.3s;
}

/* --- GLOBAL --- */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-page);
    color: var(--text-main);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    padding: 20px;
}

.container { max-width: 1100px; margin: 0 auto; padding-bottom: 100px; }
*:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* --- UTILITIES --- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-10 { margin-top: 10px; }
.mt-15 { margin-top: 15px; }
.mt-30 { margin-top: 30px; }
.mb-15 { margin-bottom: 15px; }

/* --- GRID LAYOUTS --- */
.grid-2col { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.grid-3col { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }

/* --- HEADER --- */
.page-header {
    border-bottom: 2px solid var(--primary);
    padding-bottom: 20px; margin-bottom: 30px;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px;
}
.header-titles h1 { font-size: 2rem; color: #ffffff; line-height: 1.2; }
.subtitle { font-size: 0.95rem; color: var(--text-muted); }
.back-link {
    text-decoration: none; color: var(--text-muted); border: 1px solid var(--border-light);
    padding: 8px 12px; border-radius: var(--radius-sm); transition: all var(--transition-speed);
}
.back-link:hover { color: #ffffff; border-color: #ffffff; background-color: var(--border-color); }

/* --- NAVIGATION --- */
.nav-container { display: flex; gap: 10px; margin-top: 15px; flex-wrap: wrap; }
.nav-btn {
    background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-muted);
    padding: 10px 16px; cursor: pointer; border-radius: var(--radius-sm);
    transition: var(--transition-speed); font-weight: 600; font-size: 0.95rem;
}
.nav-btn:hover { background: var(--border-color); color: #ffffff; }
.nav-btn.active { background: var(--primary); color: #ffffff; border-color: var(--primary); }

/* --- SECTIONS --- */
.section-box {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-top: 4px solid var(--primary); border-radius: var(--radius-md);
    padding: 30px; margin-bottom: 40px; animation: fadeIn 0.4s ease;
}
.section-box[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* --- TYPOGRAPHY --- */
h2 { color: var(--primary-light); border-bottom: 1px solid var(--border-light); padding-bottom: 10px; margin-bottom: 20px; }
h3 { color: var(--accent); margin-bottom: 10px; }
h4 { color: var(--primary-light); margin-bottom: 8px; margin-top: 12px; }

.subsection-title {
    color: #ffffff; border-bottom: 2px dashed var(--border-light);
    padding-bottom: 10px; margin-bottom: 15px; font-size: 1.4rem;
}
.grammar-subsection {
    padding: 20px; background: rgba(0,0,0,0.2);
    border-radius: var(--radius-md); border: 1px solid var(--border-color);
    margin-bottom: 25px;
}
.context-note {
    background: var(--bg-panel); padding: 15px; border-left: 4px solid var(--primary-light);
    color: #cccccc; margin-bottom: 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.grammar-card {
    background: var(--bg-card-alt); padding: 20px;
    border-radius: var(--radius-md); border: 1px solid var(--border-color);
}
.sound-title { font-size: 2rem; color: var(--primary-light); margin-bottom: 5px; }

/* --- RULE BOXES --- */
.rule-box {
    background: #202c38; padding: 15px; border-radius: var(--radius-sm);
    border: 1px solid #34495e; margin-bottom: 15px; font-weight: 500; border-left: 4px solid;
}
.rule-box.var-success { border-left-color: var(--primary); background: #1a2c1a; }
.rule-box.var-danger  { border-left-color: var(--danger);  background: #2c1a1a; }
.rule-box.var-info    { border-left-color: var(--info);    background: #1a1f2c; }
.rule-box.var-warning { border-left-color: var(--warning); background: #2c2410; }
.rule-box.var-purple  { border-left-color: var(--purple);  background: #1f1a2c; }

.note-box {
    background: #332222; color: var(--danger);
    padding: 12px; border-radius: var(--radius-sm);
    margin-top: 15px; border: 1px solid var(--danger);
}
.tip-box {
    background: #1a2c28; color: var(--teal);
    padding: 12px; border-radius: var(--radius-sm);
    margin-top: 15px; border: 1px solid var(--teal);
}

/* --- COMPARE TABLE --- */
.compare-table {
    width: 100%; border-collapse: collapse; margin: 12px 0;
    background: #1a1a1a; border-radius: var(--radius-sm); overflow: hidden;
}
.compare-table th {
    background: #111; color: var(--primary-light);
    text-align: left; padding: 10px 14px;
    text-transform: uppercase; font-size: 0.82rem; letter-spacing: 0.5px;
}
.compare-table td { padding: 10px 14px; border-bottom: 1px solid var(--border-color); vertical-align: top; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .wrong { color: var(--danger); }
.compare-table .right { color: var(--primary-light); }

/* --- LISTS --- */
ul.clean-list, ul.conjugation-list { list-style: none; }
.clean-list li, .conjugation-list li {
    padding: 8px 0; border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
}
.clean-list li:last-child, .conjugation-list li:last-child { border-bottom: none; }

/* --- VOCABULARY --- */
.vocab-list-container { display: flex; flex-direction: column; gap: 8px; max-width: 900px; margin: 0 auto; }
.vocab-section-header {
    font-weight: bold; color: var(--primary-light); margin-top: 18px;
    border-bottom: 1px solid var(--border-light); padding-bottom: 5px;
    text-transform: uppercase; font-size: 0.85rem; letter-spacing: 1px;
}
.vocab-header {
    display: grid; grid-template-columns: 2fr 2fr 1fr; font-weight: bold;
    color: var(--primary-light); border-bottom: 1px solid var(--border-light);
    padding-bottom: 10px; margin-bottom: 5px; text-transform: uppercase; font-size: 0.9rem;
}
.vocab-row {
    display: grid; grid-template-columns: 2fr 2fr 1fr; align-items: center;
    background: var(--bg-card-alt); padding: 11px 15px;
    border-radius: var(--radius-sm); border: 1px solid var(--border-color);
    transition: var(--transition-speed);
}
.vocab-row:hover { background: #2c3e50; border-color: var(--info); }
.vocab-row strong { color: #ffffff; }
.vocab-trans { color: var(--text-muted); font-style: italic; }
.speak-btn {
    background: none; border: none; cursor: pointer; font-size: 1.2rem;
    filter: grayscale(1); transition: 0.2s; justify-self: center;
}
.speak-btn:hover { filter: grayscale(0); transform: scale(1.2); }

/* --- QUIZ / DRILLS --- */
.quiz-block {
    border: 1px solid var(--border-color); padding: 20px;
    border-radius: var(--radius-md); background: var(--bg-card-alt);
}
.quiz-header {
    font-weight: bold; color: var(--accent); margin-bottom: 15px;
    border-bottom: 1px solid var(--border-light); padding-bottom: 8px; font-size: 1.05rem;
}
.mini-quiz-item {
    margin-bottom: 10px; padding: 11px; background: var(--bg-page);
    border-radius: var(--radius-sm); display: flex; align-items: center;
    flex-wrap: wrap; gap: 10px; border: 1px solid var(--border-color); font-size: 0.97rem;
}
.mini-quiz-item span.q-text { flex: 1; min-width: 150px; }

.quiz-input {
    background: var(--border-color); border: 2px solid var(--border-light); color: #ffffff;
    padding: 7px 11px; border-radius: var(--radius-sm); width: 130px;
    font-family: inherit; font-size: 0.95rem; transition: border-color 0.2s;
}
.quiz-input:focus { outline: none; border-color: var(--info); }
.check-btn {
    background: var(--accent); color: #000; border: none; padding: 7px 15px;
    border-radius: var(--radius-sm); cursor: pointer; font-weight: bold; transition: var(--transition-speed);
}
.check-btn:hover { background: #d35400; color: #fff; }

.ex-btn {
    background: var(--border-color); border: 1px solid var(--border-light); color: #ccc;
    padding: 7px 14px; border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition-speed); font-size: 0.91rem; margin-right: 5px; margin-top: 4px;
}
.ex-btn:hover { background: var(--border-light); color: #fff; }
.ex-btn[aria-pressed="true"] { background: var(--primary); color: #fff; border-color: var(--primary-light); }
.ex-btn.incorrect { background: var(--danger); color: #fff; border-color: var(--danger-dark); }
.feedback-icon { font-weight: bold; font-size: 1.1rem; margin-left: 5px; }

#drills-scroll-area { display: flex; flex-direction: column; gap: 20px; }

/* --- IRL READING --- */
.reading-card {
    background: #1a2535; border: 1px solid #2c4a6e;
    border-radius: var(--radius-md); padding: 25px; margin-bottom: 25px;
}
.story-label { font-size: 0.78rem; color: #888; margin-bottom: 5px; text-transform: uppercase; letter-spacing: 1px; }
.story-title { font-size: 1.2rem; font-weight: bold; color: var(--info); margin-bottom: 15px; }
.story-text {
    background: #111; border-radius: var(--radius-sm); padding: 20px;
    line-height: 1.95; color: #ddd; margin-bottom: 20px; border-left: 3px solid var(--info);
}
.story-text strong { color: var(--accent); }
.rq-item {
    background: var(--bg-card); border-radius: var(--radius-sm);
    padding: 12px 15px; margin-bottom: 10px; border: 1px solid var(--border-color);
}
.rq-item p { margin: 0 0 8px 0; font-weight: bold; }
.rq-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.rq-btn {
    background: var(--border-color); border: 1px solid var(--border-light); color: #ccc;
    padding: 7px 14px; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.88rem; transition: 0.2s;
}
.rq-btn:hover:not(:disabled) { background: var(--border-light); }
.rq-btn.correct { background: #1a5c2a !important; border-color: var(--primary-light) !important; color: var(--primary-light) !important; font-weight: bold; }
.rq-btn.wrong   { background: #5c1a1a !important; border-color: var(--danger) !important;         color: var(--danger) !important; }
.rq-result { margin-top: 8px; font-size: 0.88rem; display: none; padding: 6px 10px; border-radius: var(--radius-sm); }
.rq-result.show { display: block; }
.rq-result.ok { color: var(--primary-light); background: #1a2c1a; }
.rq-result.no { color: var(--danger);         background: #2c1a1a; }

/* --- GAME --- */
.game-instructions {
    text-align: center; margin-bottom: 20px; font-size: 1.05rem;
    background: var(--bg-panel); padding: 15px; border-radius: var(--radius-md);
}
.game-stats { text-align: center; margin-top: 15px; font-weight: bold; font-size: 1.2rem; color: var(--accent); }
.auction-podium {
    background: #2c3e50; padding: 25px; text-align: center;
    border-radius: var(--radius-md); border: 4px solid #34495e;
    max-width: 500px; margin: 0 auto 25px auto;
}
.whack-target-text { font-size: 2.5rem; color: var(--warning); font-weight: bold; }
#whack-timer-bar { width: 100%; height: 12px; background: #111; margin-top: 20px; border-radius: 6px; overflow: hidden; }
#whack-fill { height: 100%; width: 100%; background: var(--primary); transition: width 1s linear; }
.mine-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; max-width: 600px; margin: 0 auto; }
.mole-hole { background: #222; height: 100px; border-radius: 50px; position: relative; overflow: hidden; border: 4px solid var(--border-light); }
.mole {
    position: absolute; bottom: -100px; left: 50%; transform: translateX(-50%);
    width: 80%; height: 80%; background: var(--warning); border-radius: 50px 50px 10px 10px;
    transition: bottom 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.2s;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; color: #000; font-size: 1.05rem; border: 2px solid #fff; cursor: pointer;
}
.mole.up { bottom: 0; }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .vocab-row, .vocab-header { grid-template-columns: 1fr 1fr 50px; }
}
@media (max-width: 480px) {
    .mine-grid { grid-template-columns: repeat(2, 1fr); }
    h1 { font-size: 1.5rem; }
}