/* =============================================
   تقويم الطالب - الأنماط الرئيسية
   Dark Theme - كلية الهندسة المعلوماتية
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;600;700;900&family=Tajawal:wght@300;400;500;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg-primary:    #0d1117;
  --bg-secondary:  #161b22;
  --bg-card:       #1c2333;
  --bg-hover:      #21262d;
  --border:        #30363d;
  --border-light:  #21262d;

  --text-primary:  #e6edf3;
  --text-secondary:#8b949e;
  --text-muted:    #484f58;

  --accent-green:  #39d353;
  --accent-blue:   #58a6ff;
  --accent-purple: #a855f7;

  --exam:          #ef4444;
  --assignment:    #f97316;
  --project:       #a855f7;
  --lecture:       #3b82f6;
  --activity:      #22c55e;
  --competition:   #eab308;

  --radius:        10px;
  --radius-lg:     16px;
  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --transition:    0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Cairo', 'Tajawal', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  direction: rtl;
  font-size: 15px;
  line-height: 1.6;
}

body.ltr { direction: ltr; font-family: 'JetBrains Mono', 'Cairo', sans-serif; }

/* =============================================
   Layout
   ============================================= */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; right: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

body.ltr .sidebar {
  right: auto; left: 0;
  border-left: none;
  border-right: 1px solid var(--border);
}

.sidebar-logo {
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .logo-name {
  font-size: 18px;
  font-weight: 900;
  color: var(--accent-green);
  letter-spacing: -0.5px;
}

.sidebar-logo .logo-sub {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  margin-bottom: 2px;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: rgba(57,211,83,0.1); color: var(--accent-green); }

.nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar-user {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; color: #000;
  flex-shrink: 0;
}

.user-info .user-name { font-size: 13px; font-weight: 600; }
.user-info .user-role { font-size: 11px; color: var(--text-secondary); }

.main-content {
  flex: 1;
  margin-right: 240px;
  min-height: 100vh;
}

body.ltr .main-content { margin-right: 0; margin-left: 240px; }

/* =============================================
   Topbar
   ============================================= */
.topbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}

.topbar-title { font-size: 20px; font-weight: 700; }
.topbar-title span { color: var(--accent-green); }

.topbar-actions { display: flex; align-items: center; gap: 12px; }

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-family: inherit; font-size: 13px; font-weight: 600;
  cursor: pointer; border: none; transition: all var(--transition);
  text-decoration: none; white-space: nowrap;
}

.btn-primary   { background: var(--accent-green); color: #000; }
.btn-primary:hover { background: #2ebd47; transform: translateY(-1px); }

.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }

.btn-danger    { background: rgba(239,68,68,0.15); color: var(--exam); border: 1px solid rgba(239,68,68,0.3); }
.btn-danger:hover { background: var(--exam); color: #fff; }

.btn-ghost     { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-hover); }

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* =============================================
   Cards
   ============================================= */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.card-title { font-size: 15px; font-weight: 700; }

/* =============================================
   Stats Cards
   ============================================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative; overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute; top: 0; right: 0;
  width: 4px; height: 100%;
}

.stat-card.green::before  { background: var(--accent-green); }
.stat-card.blue::before   { background: var(--accent-blue); }
.stat-card.purple::before { background: var(--accent-purple); }
.stat-card.orange::before { background: var(--assignment); }

.stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 900; letter-spacing: -1px; }
.stat-badge {
  display: inline-block; padding: 2px 8px;
  border-radius: 20px; font-size: 11px; font-weight: 600;
  margin-bottom: 6px;
}

.badge-green  { background: rgba(57,211,83,0.15);  color: var(--accent-green); }
.badge-orange { background: rgba(249,115,22,0.15); color: var(--assignment); }
.badge-blue   { background: rgba(88,166,255,0.15); color: var(--accent-blue); }
.badge-red    { background: rgba(239,68,68,0.15);  color: var(--exam); }
.badge-purple { background: rgba(168,85,247,0.15); color: var(--accent-purple); }
.badge-yellow { background: rgba(234,179,8,0.15);  color: var(--competition); }

/* =============================================
   Event Badges
   ============================================= */
.event-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
}

.type-exam         { background: rgba(239,68,68,0.15);  color: var(--exam); }
.type-assignment   { background: rgba(249,115,22,0.15); color: var(--assignment); }
.type-project_interview { background: rgba(168,85,247,0.15); color: var(--project); }
.type-lecture      { background: rgba(59,130,246,0.15); color: var(--lecture); }
.type-activity     { background: rgba(34,197,94,0.15);  color: var(--activity); }
.type-competition  { background: rgba(234,179,8,0.15);  color: var(--competition); }

.year-badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 6px;
  font-size: 11px; background: var(--bg-hover);
  color: var(--text-secondary); border: 1px solid var(--border);
  margin: 2px;
}

/* =============================================
   Calendar
   ============================================= */
.calendar-wrap { background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden; }

.cal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.cal-title { font-size: 17px; font-weight: 700; color: var(--accent-green); }

.cal-grid { padding: 12px; }

.cal-days-header {
  display: grid; grid-template-columns: repeat(7, 1fr);
  text-align: center; margin-bottom: 6px;
}

.cal-day-name { font-size: 11px; color: var(--text-muted); padding: 4px; font-weight: 600; }

.cal-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }

.cal-day {
  aspect-ratio: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: flex-start;
  padding: 4px 2px; border-radius: 8px;
  cursor: pointer; transition: background var(--transition);
  font-size: 13px; position: relative;
}

.cal-day:hover { background: var(--bg-hover); }
.cal-day.other-month { color: var(--text-muted); }
.cal-day.today { background: rgba(57,211,83,0.1); font-weight: 700; color: var(--accent-green); }
.cal-day.selected { background: var(--accent-green) !important; color: #000 !important; font-weight: 700; }

.cal-day.has-events::after {
  content: '';
  position: absolute; bottom: 3px;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent-green);
}

/* =============================================
   Event List / Cards
   ============================================= */
.events-list { display: flex; flex-direction: column; gap: 10px; }

.event-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  display: flex; gap: 14px; align-items: flex-start;
  transition: all var(--transition);
  cursor: pointer;
  border-right: 3px solid transparent;
}

.event-card:hover { border-color: var(--border-light); background: var(--bg-hover); transform: translateX(-2px); }

body.ltr .event-card:hover { transform: translateX(2px); }

.event-card.exam         { border-right-color: var(--exam); }
.event-card.assignment   { border-right-color: var(--assignment); }
.event-card.project_interview { border-right-color: var(--project); }
.event-card.lecture      { border-right-color: var(--lecture); }
.event-card.activity     { border-right-color: var(--activity); }
.event-card.competition  { border-right-color: var(--competition); }

body.ltr .event-card { border-right: 1px solid var(--border); border-left: 3px solid transparent; }
body.ltr .event-card.exam         { border-left-color: var(--exam); }
body.ltr .event-card.assignment   { border-left-color: var(--assignment); }
body.ltr .event-card.project_interview { border-left-color: var(--project); }
body.ltr .event-card.lecture      { border-left-color: var(--lecture); }
body.ltr .event-card.activity     { border-left-color: var(--activity); }
body.ltr .event-card.competition  { border-left-color: var(--competition); }

.event-date-box {
  min-width: 48px; text-align: center;
  background: var(--bg-hover); border-radius: 8px;
  padding: 6px 4px;
}

.event-date-day  { font-size: 22px; font-weight: 900; line-height: 1; }
.event-date-month{ font-size: 10px; color: var(--text-secondary); text-transform: uppercase; }

.event-info { flex: 1; min-width: 0; }
.event-title { font-size: 14px; font-weight: 700; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.event-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 12px; color: var(--text-secondary); }
.event-meta span { display: flex; align-items: center; gap: 3px; }

/* =============================================
   Table
   ============================================= */
.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: right; padding: 10px 14px;
  font-size: 12px; color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  font-weight: 600; white-space: nowrap;
}

body.ltr thead th { text-align: left; }

tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px; vertical-align: middle;
}

tbody tr:hover { background: var(--bg-hover); }
tbody tr:last-child td { border-bottom: none; }

.actions-cell { display: flex; gap: 6px; }

/* =============================================
   Forms
   ============================================= */
.form-group { margin-bottom: 16px; }

label {
  display: block; font-size: 13px; font-weight: 600;
  margin-bottom: 6px; color: var(--text-secondary);
}

input[type="text"], input[type="email"], input[type="password"],
input[type="date"], input[type="time"], select, textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text-primary);
  font-family: inherit; font-size: 14px;
  transition: border-color var(--transition);
  outline: none;
}

input:focus, select:focus, textarea:focus { border-color: var(--accent-green); }

textarea { resize: vertical; min-height: 90px; }
select option { background: var(--bg-secondary); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }

.checkbox-item {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 8px; cursor: pointer;
  font-size: 13px; transition: all var(--transition);
}

.checkbox-item input[type="checkbox"] { width: auto; accent-color: var(--accent-green); }
.checkbox-item:has(input:checked) { border-color: var(--accent-green); background: rgba(57,211,83,0.08); color: var(--accent-green); }

.form-error   { background: rgba(239,68,68,0.1);  border: 1px solid rgba(239,68,68,0.3);  color: var(--exam);         padding: 10px 14px; border-radius: var(--radius); font-size: 13px; margin-bottom: 14px; }
.form-success { background: rgba(57,211,83,0.1);   border: 1px solid rgba(57,211,83,0.3);  color: var(--accent-green); padding: 10px 14px; border-radius: var(--radius); font-size: 13px; margin-bottom: 14px; }

/* =============================================
   Filters
   ============================================= */
.filters-bar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  padding: 14px 24px;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}

.filter-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.filter-label { font-size: 12px; color: var(--text-secondary); font-weight: 600; }

.filter-btn {
  padding: 5px 12px; border-radius: 20px; font-size: 12px; font-weight: 600;
  cursor: pointer; border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-secondary);
  transition: all var(--transition); font-family: inherit;
}

.filter-btn:hover { border-color: var(--accent-green); color: var(--accent-green); }
.filter-btn.active { background: rgba(57,211,83,0.15); border-color: var(--accent-green); color: var(--accent-green); }

.filter-btn.year-1.active  { background: rgba(88,166,255,0.15); border-color: var(--accent-blue); color: var(--accent-blue); }
.filter-btn.year-2.active  { background: rgba(168,85,247,0.15); border-color: var(--accent-purple); color: var(--accent-purple); }
.filter-btn.year-3.active  { background: rgba(249,115,22,0.15); border-color: var(--assignment); color: var(--assignment); }
.filter-btn.year-4.active  { background: rgba(234,179,8,0.15);  border-color: var(--competition); color: var(--competition); }
.filter-btn.year-5.active  { background: rgba(239,68,68,0.15);  border-color: var(--exam); color: var(--exam); }

.view-toggle { display: flex; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.view-btn { padding: 6px 12px; cursor: pointer; font-size: 14px; border: none; background: none; color: var(--text-secondary); transition: all var(--transition); }
.view-btn.active { background: var(--accent-green); color: #000; }

/* =============================================
   Auth Pages
   ============================================= */
.auth-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg-primary);
  background-image: radial-gradient(ellipse at 20% 50%, rgba(57,211,83,0.05) 0%, transparent 60%),
                    radial-gradient(ellipse at 80% 20%, rgba(88,166,255,0.05) 0%, transparent 60%);
}

.auth-card {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px 32px;
  width: 100%; max-width: 420px; box-shadow: var(--shadow);
}

.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-logo .logo-main { font-size: 24px; font-weight: 900; color: var(--accent-green); }
.auth-logo .logo-sub  { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

.auth-tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 1px solid var(--border); }
.auth-tab { flex: 1; text-align: center; padding: 10px; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--text-secondary); border-bottom: 2px solid transparent; margin-bottom: -1px; transition: all var(--transition); }
.auth-tab.active { color: var(--accent-green); border-bottom-color: var(--accent-green); }

/* =============================================
   Modal
   ============================================= */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}

.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow);
  transform: translateY(20px); transition: transform var(--transition);
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal-header {
  padding: 20px 24px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}

.modal-title  { font-size: 16px; font-weight: 700; }
.modal-close  { background: none; border: none; color: var(--text-secondary); cursor: pointer; font-size: 18px; padding: 4px; }
.modal-close:hover { color: var(--text-primary); }
.modal-body   { padding: 24px; }

/* =============================================
   Pagination
   ============================================= */
.pagination { display: flex; gap: 6px; align-items: center; justify-content: center; padding: 16px; }
.page-btn { padding: 6px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text-secondary); cursor: pointer; font-size: 13px; font-family: inherit; transition: all var(--transition); }
.page-btn:hover { border-color: var(--accent-green); color: var(--accent-green); }
.page-btn.active { background: var(--accent-green); color: #000; border-color: var(--accent-green); font-weight: 700; }
.page-info { font-size: 12px; color: var(--text-secondary); padding: 0 8px; }

/* =============================================
   Language Toggle
   ============================================= */
.lang-toggle {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg-hover); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden; cursor: pointer;
  font-size: 12px; font-weight: 700;
}

.lang-btn { padding: 5px 10px; transition: all var(--transition); color: var(--text-secondary); text-decoration: none; }
.lang-btn.active { background: var(--accent-green); color: #000; }

/* =============================================
   Notifications dot
   ============================================= */
.notif-btn { position: relative; }
.notif-dot { position: absolute; top: -2px; right: -2px; width: 8px; height: 8px; border-radius: 50%; background: var(--exam); border: 2px solid var(--bg-secondary); }

/* =============================================
   Empty State
   ============================================= */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-secondary); }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-size: 16px; color: var(--text-primary); margin-bottom: 6px; }

/* =============================================
   Mobile Menu
   ============================================= */
.mobile-menu-btn {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 22px; cursor: pointer;
}

.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(100%);
  }
  body.ltr .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0) !important; }

  .main-content { margin-right: 0 !important; margin-left: 0 !important; }
  .mobile-menu-btn { display: flex; }
  .sidebar-overlay.open { display: block; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .filters-bar { padding: 10px 14px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 24px 18px; }
}

/* =============================================
   Scrollbar
   ============================================= */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* =============================================
   Animations
   ============================================= */
@keyframes fadeIn  { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse   { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.fade-in { animation: fadeIn 0.3s ease forwards; }
.loading { animation: pulse 1.5s infinite; }

.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }