/* ===== منصة الطلبة — تصميم الموقع العام ===== */
:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --danger: #ef4444;
  --radius: 14px;
  --shadow: 0 4px 20px rgba(15, 23, 42, .07);
  --font: 'Segoe UI', Tahoma, Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; }
[dir="ltr"] body { font-family: 'Segoe UI', Roboto, Arial, sans-serif; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* ===== الترويسة ===== */
.site-header {
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.logo { font-size: 20px; font-weight: 800; color: var(--primary); white-space: nowrap; }
.logo span { color: var(--accent); }
.site-nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.site-nav a { padding: 8px 12px; border-radius: 10px; font-size: 14px; font-weight: 600; color: var(--text-muted); }
.site-nav a:hover, .site-nav a.active { background: #eef2ff; color: var(--primary); }
.header-actions { display: flex; gap: 8px; align-items: center; }
.lang-btn {
  border: 1px solid var(--border); background: var(--card-bg); border-radius: 10px;
  padding: 7px 12px; cursor: pointer; font-weight: 700; font-size: 13px;
}
.lang-btn:hover { border-color: var(--primary); color: var(--primary); }
.menu-toggle { display: none; border: 1px solid var(--border); background: var(--card-bg); border-radius: 10px; padding: 8px 12px; font-size: 18px; cursor: pointer; }

/* ===== البطل (Hero) ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #172554 100%);
  color: #fff; padding: 56px 0; text-align: center;
}
.hero h1 { font-size: 32px; margin-bottom: 12px; }
.hero p { opacity: .85; font-size: 17px; margin-bottom: 28px; }
.search-box {
  display: flex; max-width: 620px; margin: 0 auto; background: #fff;
  border-radius: 14px; overflow: hidden; box-shadow: 0 12px 40px rgba(0,0,0,.25);
}
.search-box input {
  flex: 1; border: none; outline: none; padding: 16px 20px; font-size: 16px;
  color: var(--text); background: transparent;
}
.search-box button {
  background: var(--accent); border: none; color: #fff; font-weight: 800;
  padding: 0 28px; font-size: 16px; cursor: pointer;
}
.search-box button:hover { filter: brightness(1.08); }

/* ===== الأقسام ===== */
.section { padding: 40px 0; }
.section-title { font-size: 22px; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.section-title::before { content: ''; width: 5px; height: 24px; background: var(--accent); border-radius: 4px; }

/* ===== البطاقات ===== */
.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(15,23,42,.12); }
.card h3 { font-size: 16px; margin-bottom: 6px; }
.card p { font-size: 13px; color: var(--text-muted); }
.quick-card { text-align: center; padding: 28px 16px; }
.quick-card .icon { font-size: 38px; margin-bottom: 10px; display: block; }

/* ===== قوائم ونتائج ===== */
.item-row {
  display: flex; align-items: center; gap: 14px; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; margin-bottom: 10px; transition: border-color .15s;
}
.item-row:hover { border-color: var(--primary-light); }
.item-row .row-icon { font-size: 26px; }
.item-row .row-body { flex: 1; }
.item-row .row-body strong { display: block; font-size: 15px; }
.item-row .row-body small { color: var(--text-muted); font-size: 12px; }
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 700;
}
.badge-exam { background: #dbeafe; color: #1d4ed8; }
.badge-assignment { background: #fef3c7; color: #b45309; }
.badge-correction { background: #d1fae5; color: #047857; }
.badge-cat { background: #ede9fe; color: #6d28d9; }
.badge-year { background: #f1f5f9; color: #475569; }

/* ===== أزرار ===== */
.btn {
  display: inline-block; border: none; border-radius: 10px; padding: 10px 20px;
  font-size: 14px; font-weight: 700; cursor: pointer; text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { display: block; width: 100%; }

/* ===== النماذج ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 700; font-size: 14px; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 14px; font-family: inherit; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary-light);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ===== شريط التصنيفات ===== */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.chip {
  padding: 7px 16px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card-bg); cursor: pointer; font-size: 13px; font-weight: 600;
}
.chip.active, .chip:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== إشعار تيليغرام ===== */
.telegram-banner {
  background: linear-gradient(135deg, #229ED9, #1684b5); color: #fff;
  border-radius: var(--radius); padding: 22px 26px; display: flex;
  align-items: center; gap: 18px; flex-wrap: wrap; box-shadow: var(--shadow);
}
.telegram-banner .tg-text { flex: 1; min-width: 220px; }
.telegram-banner h3 { font-size: 18px; margin-bottom: 4px; }
.telegram-banner p { opacity: .9; font-size: 14px; }
.telegram-banner a { background: #fff; color: #229ED9; padding: 10px 22px; border-radius: 10px; font-weight: 800; }

/* ===== إعلان خفيف ===== */
.ad-slot {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 18px; text-align: center; color: var(--text-muted); font-size: 13px;
  margin: 24px 0; background: #fbfdff;
}

/* ===== التذييل ===== */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 40px 0 20px; margin-top: 48px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 28px; margin-bottom: 28px; }
.footer-grid h4 { color: #fff; margin-bottom: 12px; font-size: 15px; }
.footer-grid a { display: block; padding: 4px 0; font-size: 14px; opacity: .8; }
.footer-grid a:hover { opacity: 1; color: var(--accent); }
.footer-bottom { border-top: 1px solid #1e293b; padding-top: 18px; text-align: center; font-size: 13px; opacity: .65; }

/* ===== صفحة داخلية ===== */
.page-hero { background: var(--primary); color: #fff; padding: 34px 0; }
.page-hero h1 { font-size: 26px; }
.page-hero p { opacity: .85; font-size: 14px; margin-top: 6px; }
.filters-bar {
  display: flex; gap: 10px; flex-wrap: wrap; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin: 20px 0;
}
.filters-bar select, .filters-bar input {
  flex: 1; min-width: 160px; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 14px; font-family: inherit;
}

/* ===== حالة فارغة ===== */
.empty {
  text-align: center; padding: 48px 20px; color: var(--text-muted);
}
.empty .icon { font-size: 44px; display: block; margin-bottom: 10px; }

/* ===== رسالة نجاح ===== */
.toast {
  position: fixed; bottom: 24px; inset-inline-start: 50%; transform: translateX(50%);
  background: var(--text); color: #fff; padding: 13px 26px; border-radius: 12px;
  font-size: 14px; font-weight: 600; z-index: 200; box-shadow: 0 10px 30px rgba(0,0,0,.3);
  display: none;
}
[dir="ltr"] .toast { transform: translateX(-50%); }
.toast.show { display: block; animation: toastIn .3s; }
@keyframes toastIn { from { opacity: 0; bottom: 10px; } to { opacity: 1; bottom: 24px; } }

/* ===== الموبايل ===== */
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .site-nav {
    display: none; position: absolute; top: 100%; inset-inline-start: 0;
    inset-inline-end: 0; background: var(--card-bg); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 10px 16px;
  }
  .site-nav.open { display: flex; }
  .hero h1 { font-size: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .header-inner { flex-wrap: wrap; }
}