/* ===== Scientific Writing Course — Dark Academic Theme ===== */
@import url('https://fonts.googleapis.com/css2?family=Heebo:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --bg: #0f172a;
    --bg2: #1e293b;
    --card: rgba(255,255,255,0.04);
    --card-hover: rgba(255,255,255,0.07);
    --accent: #f59e0b;
    --accent2: #d97706;
    --accent-glow: rgba(245,158,11,0.15);
    --blue: #3b82f6;
    --green: #10b981;
    --red: #ef4444;
    --purple: #8b5cf6;
    --teal: #14b8a6;
    --text: #f1f5f9;
    --dim: #94a3b8;
    --muted: #64748b;
    --border: rgba(255,255,255,0.08);
    --radius: 16px;
    --radius-sm: 10px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
    font-family:'Heebo','Segoe UI',sans-serif;
    background:linear-gradient(135deg,var(--bg) 0%,var(--bg2) 50%,var(--bg) 100%);
    color:var(--text);
    direction:rtl;
    text-align:right;
    min-height:100vh;
    line-height:1.8;
    font-size:17px;
}

/* ===== Layout ===== */
.container { max-width:1100px; margin:0 auto; padding:20px; }

/* ===== Navbar ===== */
.navbar {
    display:flex; align-items:center; justify-content:space-between;
    padding:14px 24px;
    background:var(--card);
    backdrop-filter:blur(20px);
    border:1px solid var(--border);
    border-radius:var(--radius);
    margin-bottom:32px;
    position:sticky; top:20px; z-index:100;
}
.navbar-brand { display:flex; align-items:center; gap:12px; text-decoration:none; color:var(--text); }
.navbar-brand .logo { font-size:28px; }
.navbar-brand h1 { font-size:20px; font-weight:700; color:var(--accent); }
.navbar-links { display:flex; gap:8px; list-style:none; }
.navbar-links a {
    color:var(--dim); text-decoration:none; padding:8px 16px;
    border-radius:var(--radius-sm); font-size:14px; font-weight:500;
    transition:all .3s ease;
}
.navbar-links a:hover, .navbar-links a.active {
    color:var(--accent); background:var(--accent-glow);
}

/* ===== Hero ===== */
.hero { text-align:center; padding:60px 20px; margin-bottom:40px; }
.hero h1 {
    font-size:48px; font-weight:900; margin-bottom:16px;
    background:linear-gradient(135deg,var(--text) 0%,var(--accent) 100%);
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.hero p { font-size:20px; color:var(--dim); max-width:600px; margin:0 auto; }

/* ===== Module Grid ===== */
.module-grid {
    display:grid; grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
    gap:24px; margin-bottom:40px;
}
.module-card {
    background:var(--card); backdrop-filter:blur(12px);
    border:1px solid var(--border); border-radius:var(--radius);
    padding:28px; text-decoration:none; color:var(--text);
    transition:all .3s ease; position:relative; overflow:hidden;
    animation:fadeUp .6s ease both;
}
.module-card::before {
    content:''; position:absolute; top:0; right:0;
    width:4px; height:100%;
    background:linear-gradient(180deg,var(--accent),var(--accent2));
    border-radius:0 var(--radius) var(--radius) 0;
    transform:scaleY(0); transition:transform .3s ease;
}
.module-card:hover {
    background:var(--card-hover); border-color:var(--accent-glow);
    transform:translateY(-4px);
    box-shadow:0 8px 40px rgba(0,0,0,.4), 0 0 30px var(--accent-glow);
}
.module-card:hover::before { transform:scaleY(1); }
.module-card .module-num {
    display:inline-flex; align-items:center; justify-content:center;
    width:44px; height:44px;
    background:linear-gradient(135deg,var(--accent),var(--accent2));
    border-radius:12px; font-size:18px; font-weight:700;
    margin-bottom:16px; color:white;
}
.module-card h3 { font-size:20px; font-weight:700; margin-bottom:8px; }
.module-card p { color:var(--dim); font-size:14px; line-height:1.6; }
.module-card .module-meta {
    display:flex; gap:16px; margin-top:16px;
    font-size:13px; color:var(--muted);
}

/* ===== Section Card (Module Pages) ===== */
.section-card {
    background:var(--card); backdrop-filter:blur(12px);
    border:1px solid var(--border); border-radius:var(--radius);
    padding:32px; margin-bottom:24px;
    animation:fadeUp .6s ease both;
}
.section-card h2 {
    font-size:28px; font-weight:700; margin-bottom:20px;
    display:flex; align-items:center; gap:12px; color:var(--accent);
}
.section-card h3 { font-size:22px; font-weight:600; margin:24px 0 12px; color:var(--text); }
.section-card h4 { font-size:18px; font-weight:600; margin:16px 0 8px; color:var(--accent); }
.section-card p { margin-bottom:14px; line-height:1.9; }
.section-card ul, .section-card ol { padding-right:24px; margin-bottom:14px; }
.section-card li { margin-bottom:10px; line-height:1.8; }

/* ===== Content Boxes ===== */
.tip-box {
    background:rgba(245,158,11,0.06); border:1px solid rgba(245,158,11,0.2);
    border-radius:var(--radius-sm); padding:18px 22px; margin:16px 0;
}
.tip-box .tip-title { font-weight:700; color:var(--accent); margin-bottom:6px; font-size:15px; }

.info-box {
    background:rgba(59,130,246,0.06); border:1px solid rgba(59,130,246,0.2);
    border-radius:var(--radius-sm); padding:18px 22px; margin:16px 0;
}
.info-box .info-title { font-weight:700; color:var(--blue); margin-bottom:6px; font-size:15px; }

.warn-box {
    background:rgba(239,68,68,0.06); border:1px solid rgba(239,68,68,0.2);
    border-radius:var(--radius-sm); padding:18px 22px; margin:16px 0;
}
.warn-box .warn-title { font-weight:700; color:var(--red); margin-bottom:6px; font-size:15px; }

.success-box {
    background:rgba(16,185,129,0.06); border:1px solid rgba(16,185,129,0.2);
    border-radius:var(--radius-sm); padding:18px 22px; margin:16px 0;
}

.example-box {
    background:rgba(139,92,246,0.06); border:1px solid rgba(139,92,246,0.2);
    border-radius:var(--radius-sm); padding:18px 22px; margin:16px 0;
}
.example-box .example-title { font-weight:700; color:var(--purple); margin-bottom:6px; font-size:15px; }

/* ===== Structure Box ===== */
.structure-list { list-style:none; padding:0; counter-reset:struct; }
.structure-list li {
    counter-increment:struct; padding:12px 18px; margin-bottom:8px;
    background:rgba(255,255,255,0.03); border:1px solid var(--border);
    border-radius:var(--radius-sm); display:flex; align-items:center; gap:14px;
}
.structure-list li::before {
    content:counter(struct); display:flex; align-items:center; justify-content:center;
    min-width:32px; height:32px; border-radius:8px;
    background:var(--accent-glow); color:var(--accent);
    font-weight:700; font-size:14px;
}

/* ===== Quiz ===== */
.quiz-question {
    background:rgba(255,255,255,0.03); border:1px solid var(--border);
    border-radius:var(--radius); padding:24px; margin-bottom:20px;
    transition:all .3s ease;
}
.quiz-question.correct { border-color:rgba(16,185,129,0.4); background:rgba(16,185,129,0.05); }
.quiz-question.wrong { border-color:rgba(239,68,68,0.4); background:rgba(239,68,68,0.05); }

.quiz-question .q-num {
    display:inline-flex; align-items:center; justify-content:center;
    width:32px; height:32px; background:var(--accent-glow);
    color:var(--accent); border-radius:50%; font-size:14px;
    font-weight:700; margin-left:12px;
}
.quiz-question .q-text { font-size:17px; line-height:1.8; margin-bottom:16px; }

.quiz-options { display:flex; flex-direction:column; gap:8px; }
.quiz-option {
    display:flex; align-items:flex-start; gap:12px;
    padding:12px 16px; background:rgba(255,255,255,0.03);
    border:1px solid var(--border); border-radius:var(--radius-sm);
    cursor:pointer; transition:all .3s ease; font-size:16px;
}
.quiz-option:hover:not(.disabled) { background:rgba(245,158,11,0.08); border-color:var(--accent-glow); }
.quiz-option.selected { background:rgba(245,158,11,0.1); border-color:var(--accent); }
.quiz-option.correct-answer { background:rgba(16,185,129,0.1); border-color:var(--green); }
.quiz-option.wrong-answer { background:rgba(239,68,68,0.1); border-color:var(--red); }
.quiz-option.disabled { cursor:default; opacity:0.7; }

.quiz-feedback {
    margin-top:12px; padding:12px 16px; border-radius:var(--radius-sm);
    font-size:15px; font-weight:500; display:none;
}
.quiz-feedback.show { display:block; }
.quiz-feedback.correct-fb { background:rgba(16,185,129,0.1); color:var(--green); border:1px solid rgba(16,185,129,0.2); }
.quiz-feedback.wrong-fb { background:rgba(239,68,68,0.1); color:var(--red); border:1px solid rgba(239,68,68,0.2); }

.quiz-score {
    text-align:center; padding:24px; margin-top:24px;
    background:var(--card); border:1px solid var(--border);
    border-radius:var(--radius); font-size:22px; font-weight:700;
}

/* ===== Checklist ===== */
.checklist { list-style:none; padding:0; }
.checklist li {
    padding:12px 16px; margin-bottom:8px;
    background:rgba(255,255,255,0.03); border:1px solid var(--border);
    border-radius:var(--radius-sm); display:flex; align-items:center; gap:12px;
    cursor:pointer; transition:all .3s ease;
}
.checklist li:hover { background:rgba(245,158,11,0.05); }
.checklist li.checked { background:rgba(16,185,129,0.06); border-color:rgba(16,185,129,0.2); }
.checklist li .check-icon { font-size:20px; }

/* ===== Comparison Table ===== */
.compare-table { width:100%; border-collapse:collapse; margin:16px 0; font-size:15px; }
.compare-table th {
    background:rgba(245,158,11,0.12); color:var(--accent);
    font-weight:600; padding:12px 16px; text-align:right;
    border-bottom:2px solid var(--accent-glow);
}
.compare-table td { padding:10px 16px; border-bottom:1px solid var(--border); }
.compare-table tr:hover td { background:rgba(255,255,255,0.03); }
.compare-good { color:var(--green); font-weight:600; }
.compare-bad { color:var(--red); font-weight:600; }

/* ===== Progress Bar ===== */
.progress-container {
    background:rgba(255,255,255,0.1); border-radius:4px;
    height:6px; margin-top:16px; overflow:hidden;
}
.progress-fill {
    height:100%; border-radius:4px;
    background:linear-gradient(90deg,var(--accent),var(--green));
    transition:width .5s ease;
}

/* ===== Footer ===== */
.site-footer {
    text-align:center; padding:40px 20px; color:var(--muted);
    font-size:14px; border-top:1px solid var(--border); margin-top:60px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    display:flex; gap:8px; align-items:center;
    font-size:14px; color:var(--muted); margin-bottom:24px;
}
.breadcrumb a { color:var(--dim); text-decoration:none; transition:color .3s; }
.breadcrumb a:hover { color:var(--accent); }
.breadcrumb .sep { opacity:0.5; }

/* ===== Navigation Footer ===== */
.module-nav {
    display:flex; justify-content:space-between;
    margin-top:40px; padding-top:24px; border-top:1px solid var(--border);
}
.module-nav a {
    display:flex; align-items:center; gap:8px;
    color:var(--accent); text-decoration:none; padding:12px 24px;
    background:var(--card); border:1px solid var(--border);
    border-radius:var(--radius-sm); transition:all .3s ease; font-weight:500;
}
.module-nav a:hover { background:var(--accent-glow); border-color:var(--accent-glow); transform:translateY(-2px); }

/* ===== Animations ===== */
@keyframes fadeUp {
    from { opacity:0; transform:translateY(20px); }
    to { opacity:1; transform:translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width:768px) {
    .container { padding:12px; }
    .navbar { flex-direction:column; gap:12px; position:static; }
    .hero h1 { font-size:32px; }
    .module-grid { grid-template-columns:1fr; }
    .section-card { padding:20px; }
    .module-nav { flex-direction:column; gap:12px; }
}

/* ===== Print ===== */
@media print {
    .navbar, .module-nav, .quiz-options { display:none !important; }
    body { background:white; color:black; }
    .section-card { border:1px solid #ddd; background:white; }
}