/* ============================================================
   MyClassGrid - Shared Styles
   ============================================================ */

:root {
  --bg: #f5f6fa; --card: #ffffff; --surface: #f8f9fb; --border: #e8eaed;
  --text: #1a1a2e; --text2: #5f6368; --text3: #9aa0a6; --white: #ffffff;
  --purple: #6C5CE7; --purple-light: #a29bfe;
  --blue: #0984e3; --green: #00b894; --orange: #fdcb6e;
  --red: #ff6b6b; --pink: #fd79a8; --teal: #00cec9;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08); --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 12px; --radius-sm: 8px;
  --topbar-h: 56px; --font: 'Inter', system-ui, -apple-system, sans-serif;
  --speed: 0.2s;
}
[data-theme="dark"] {
  --bg: #0f0f1a; --card: #1a1a2e; --surface: #16213e;
  --border: #2d2d44; --text: #e8e8f0; --text2: #a0a0b8; --text3: #6c6c88;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
button { cursor: pointer; font: inherit; border: none; background: none; }
input, select { font: inherit; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text3); border-radius: 3px; }
a { color: inherit; text-decoration: none; }

/* ============================================================
   TOP BAR
   ============================================================ */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  background: var(--card); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-center { flex: 1; display: flex; justify-content: center; }
.topbar-right { display: flex; align-items: center; gap: 6px; }

.topbar-brand { display: flex; align-items: center; gap: 6px; }
.brand-icon { font-size: 22px; }
.brand-text { font-size: 15px; color: var(--text2); }
.brand-text strong { color: var(--purple); font-weight: 700; }

/* Nav */
.topbar-nav { display: flex; gap: 2px; background: var(--surface); padding: 3px; border-radius: 10px; }
.nav-link {
  padding: 7px 16px; border-radius: 8px;
  font-size: 12px; font-weight: 600;
  color: var(--text3); transition: var(--speed);
  display: flex; align-items: center; gap: 5px;
}
.nav-link:hover { color: var(--text2); }
.nav-link.active { background: var(--purple); color: var(--white); box-shadow: 0 2px 8px rgba(108,92,231,0.3); }

.topbar-btn {
  width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: var(--speed); color: var(--text2);
}
.topbar-btn:hover { background: var(--surface); }

/* Language Dropdown */
.lang-selector { position: relative; }
.dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); min-width: 170px;
  display: none; z-index: 200; overflow: hidden;
  border: 1px solid var(--border);
}
.dropdown.active { display: block; animation: dropIn 0.15s ease; }
.dropdown-title { padding: 10px 14px; font-size: 11px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.dropdown-item { padding: 9px 14px; font-size: 13px; cursor: pointer; transition: var(--speed); }
.dropdown-item:hover { background: var(--surface); }
.dropdown-item.active { background: var(--purple); color: var(--white); font-weight: 600; }

/* Hamburger */
.hamburger { display: none; padding: 6px; }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; margin: 3px 0; }

/* ============================================================
   PAGE LAYOUT
   ============================================================ */
.page { margin-top: var(--topbar-h); min-height: calc(100vh - var(--topbar-h)); padding: 20px; }
.page-header { margin-bottom: 20px; }
.page-title { font-size: 22px; font-weight: 800; }
.page-sub { font-size: 13px; color: var(--text3); margin-top: 2px; }

/* Cards */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--border); padding: 16px; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.card-title { font-size: 14px; font-weight: 700; }
.card-grid { display: grid; gap: 12px; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Buttons */
.btn-primary { padding: 10px 18px; border-radius: var(--radius-sm); background: var(--purple); color: var(--white); font-size: 13px; font-weight: 600; transition: var(--speed); }
.btn-primary:hover { background: #5a4bd1; transform: translateY(-1px); }
.btn-outline { padding: 10px 18px; border-radius: var(--radius-sm); background: transparent; color: var(--purple); font-size: 13px; font-weight: 600; border: 1.5px solid var(--purple); transition: var(--speed); }
.btn-outline:hover { background: var(--purple); color: var(--white); }
.btn-sm { padding: 6px 12px; border-radius: 6px; font-size: 11px; font-weight: 600; }
.btn-danger { background: var(--red); color: white; }
.btn-success { background: var(--green); color: white; }

/* Stat Boxes */
.stat-box { text-align: center; padding: 16px 12px; background: var(--surface); border-radius: var(--radius-sm); }
.stat-num { display: block; font-size: 22px; font-weight: 800; color: var(--purple); line-height: 1.2; white-space: nowrap; }
.stat-lbl { font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }

/* Empty State */
.empty { display: flex; flex-direction: column; align-items: center; padding: 40px 20px; text-align: center; }
.empty-icon { font-size: 48px; margin-bottom: 12px; opacity: 0.6; }
.empty p { font-size: 14px; color: var(--text3); max-width: 300px; }

/* Toast */
.toasts { position: fixed; bottom: 16px; right: 16px; z-index: 500; display: flex; flex-direction: column; gap: 6px; }
.toast { padding: 10px 16px; border-radius: var(--radius-sm); background: var(--card); color: var(--text); box-shadow: var(--shadow-lg); font-size: 12px; font-weight: 500; display: flex; align-items: center; gap: 8px; animation: slideUp 0.3s ease; border-left: 3px solid var(--purple); min-width: 220px; }
.toast.success { border-left-color: var(--green); }
.toast.error { border-left-color: var(--red); }
.toast.warning { border-left-color: var(--orange); }
.toast.info { border-left-color: var(--blue); }
.toast-x { margin-left: auto; font-size: 12px; color: var(--text3); cursor: pointer; }

/* Modal */
.modal-bg { position: fixed; inset: 0; z-index: 300; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center; padding: 16px; }
.modal-bg.active { display: flex; }
.modal-box { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; max-width: 460px; max-height: 80vh; overflow: hidden; display: flex; flex-direction: column; animation: modalPop 0.2s ease; }
.modal-top { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.modal-top h3 { font-size: 15px; font-weight: 700; }
.modal-x { font-size: 20px; color: var(--text3); padding: 4px 6px; }
.modal-content { padding: 16px; overflow-y: auto; flex: 1; }
.modal-actions { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { padding: 10px 12px; text-align: left; font-weight: 700; color: var(--text3); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 2px solid var(--border); }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--surface); }

/* Tags/Badges */
.badge { display: inline-block; padding: 3px 8px; border-radius: 99px; font-size: 10px; font-weight: 700; }
.badge-green { background: rgba(0,184,148,0.1); color: var(--green); }
.badge-orange { background: rgba(253,203,110,0.2); color: #e17055; }
.badge-red { background: rgba(255,107,107,0.1); color: var(--red); }
.badge-purple { background: rgba(108,92,231,0.1); color: var(--purple); }

/* Search */
.search-wrap { display: flex; gap: 6px; margin-bottom: 12px; }
.search-wrap input { flex: 1; padding: 10px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--border); background: var(--surface); color: var(--text); font-size: 13px; transition: var(--speed); }
.search-wrap input:focus { outline: none; border-color: var(--purple); box-shadow: 0 0 0 3px rgba(108,92,231,0.1); }

/* Subject Groups - Accordion */
.subject-group { margin-bottom: 4px; }
.subject-header {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; cursor: pointer;
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); transition: var(--speed);
  user-select: none;
}
.subject-header:hover { border-color: var(--purple); background: var(--surface); }
.subject-header.open { border-color: var(--purple); border-bottom-left-radius: 0; border-bottom-right-radius: 0; background: var(--purple); color: white; }
.subject-name { font-weight: 700; font-size: 14px; flex: 1; }
.subject-count {
  background: var(--purple); color: white; padding: 2px 8px;
  border-radius: 99px; font-size: 11px; font-weight: 600;
}
.subject-header.open .subject-count { background: rgba(255,255,255,0.3); }
.subject-arrow { font-size: 12px; color: var(--text3); transition: var(--speed); }
.subject-header.open .subject-arrow { color: white; }
.subject-classes { border: 1.5px solid var(--purple); border-top: none; border-radius: 0 0 var(--radius-sm) var(--radius-sm); padding: 8px; background: var(--surface); }

/* Class Cards */
.class-card { background: var(--card); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 12px; transition: var(--speed); position: relative; overflow: hidden; }
.class-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--card-color, var(--purple)); }
.class-card:hover { border-color: var(--purple); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.cc-title { font-size: 13px; font-weight: 700; }
.cc-sub { font-size: 11px; color: var(--text3); margin: 2px 0 6px; }
.cc-meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 10px; color: var(--text3); }
.cc-seats { font-weight: 700; }
.seats-ok { color: var(--green); } .seats-low { color: var(--orange); } .seats-no { color: var(--red); }
.cc-actions { display: flex; gap: 4px; margin-top: 8px; }
.cc-add { padding: 5px 12px; border-radius: 6px; background: var(--purple); color: var(--white); font-size: 11px; font-weight: 600; transition: var(--speed); }
.cc-add:hover { background: #5a4bd1; }
.cc-add.added { background: var(--green); }

/* Monitor */
.monitor-card { background: var(--card); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.monitor-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.monitor-status { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.monitor-dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-active { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot-inactive { background: var(--text3); }
.monitor-meta { display: flex; gap: 12px; font-size: 11px; color: var(--text3); margin-top: 8px; }
.monitor-actions { display: flex; gap: 6px; margin-top: 12px; }

/* Form */
.form-group { margin-bottom: 12px; }
.form-label { display: block; font-size: 11px; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.form-input { width: 100%; padding: 9px 12px; border-radius: var(--radius-sm); border: 1.5px solid var(--border); background: var(--surface); color: var(--text); font-size: 13px; }
.form-input:focus { outline: none; border-color: var(--purple); }
.form-row { display: flex; gap: 8px; }
.form-row > * { flex: 1; }

/* Filter Pills */
.filter-bar { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 12px; }
.filter-pill { padding: 5px 10px; border-radius: 99px; font-size: 10px; font-weight: 600; background: var(--surface); color: var(--text3); border: 1px solid var(--border); transition: var(--speed); }
.filter-pill:hover { border-color: var(--purple); color: var(--purple); }
.action-btn:hover { border-color: var(--purple); color: var(--purple); }

/* Export Dropdown */
.export-dropdown-wrap { position: relative; }
.export-dropdown {
  position: absolute; top: calc(100% + 4px); right: 0; z-index: 10;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
  min-width: 140px; display: none;
}
.export-dropdown.active { display: block; animation: dropIn 0.15s ease; }
.export-option {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 10px 14px; font-size: 12px; font-weight: 600;
  color: var(--text); text-align: left;
  transition: var(--speed);
}
.export-option:hover { background: var(--surface); }
.export-option:first-child { border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
.export-option:last-child { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.filter-pill.active { background: var(--purple); color: var(--white); border-color: var(--purple); }

/* Chips (Time Block days) */
.chip {
  padding: 6px 14px; border-radius: 99px;
  font-size: 12px; font-weight: 600;
  background: var(--surface); color: var(--text3);
  border: 1.5px solid var(--border); cursor: pointer;
  transition: var(--speed); user-select: none;
}
.chip:hover { border-color: var(--purple); color: var(--purple); background: rgba(108,92,231,0.05); }
.chip.active { background: var(--purple); color: var(--white); border-color: var(--purple); box-shadow: 0 2px 6px rgba(108,92,231,0.3); }

/* Term Pills */
.term-pills { display: flex; gap: 4px; background: var(--surface); padding: 3px; border-radius: 10px; }
.term-pill { padding: 6px 14px; border-radius: 8px; font-size: 12px; font-weight: 600; color: var(--text3); transition: var(--speed); }
.term-pill:hover { color: var(--text); }
.term-pill.active { background: var(--purple); color: var(--white); box-shadow: 0 2px 8px rgba(108,92,231,0.3); }
.term-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; margin-left: 4px; vertical-align: middle; }

/* Welcome */
.welcome-bg { position: fixed; inset: 0; z-index: 400; background: linear-gradient(135deg, #6C5CE7 0%, #0984e3 50%, #00b894 100%); display: flex; align-items: center; justify-content: center; }
.welcome-bg.hidden { display: none; }
.welcome-box { background: rgba(255,255,255,0.95); border-radius: 24px; padding: 48px 40px; text-align: center; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); animation: modalPop 0.4s ease; }
[data-theme="dark"] .welcome-box { background: rgba(26,26,46,0.95); }
.welcome-emoji { font-size: 56px; display: block; margin-bottom: 12px; }
.welcome-box h2 { font-size: 24px; font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
.welcome-highlight { color: var(--purple); }
.welcome-box p { font-size: 14px; color: var(--text2); margin-bottom: 24px; line-height: 1.6; }
.btn-big { padding: 14px 32px; border-radius: 12px; background: var(--purple); color: var(--white); font-size: 15px; font-weight: 700; box-shadow: 0 4px 15px rgba(108,92,231,0.3); transition: var(--speed); display: inline-block; }
.btn-big:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(108,92,231,0.4); }

/* Quick Actions Grid */
.quick-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.quick-card { background: var(--card); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; transition: var(--speed); cursor: pointer; }
.quick-card:hover { border-color: var(--purple); transform: translateY(-2px); box-shadow: var(--shadow); }
.quick-icon { font-size: 32px; display: block; margin-bottom: 8px; }
.quick-title { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.quick-desc { font-size: 11px; color: var(--text3); }

/* RTL */
[dir="rtl"] .topbar { direction: rtl; }
[dir="rtl"] .dropdown { right: auto; left: 0; }

/* Responsive */
@media (max-width: 768px) {
  .topbar-center { display: none; }
  .hamburger { display: block; }
  .page { padding: 12px; }
  .page-title { font-size: 18px; }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .quick-grid { grid-template-columns: 1fr; }
  .stat-num { font-size: 20px; }
}

/* Print */
@media print { .topbar, .toasts, .modal-bg { display: none !important; } .page { margin-top: 0; padding: 8px; } body { background: white; } @page { margin: 1cm; size: landscape; } }

/* Animations */
@keyframes dropIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes modalPop { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
:focus-visible { outline: 2px solid var(--purple); outline-offset: 2px; }