/* style.css — ટાઇમટેબલ એપ — Quantum AI IDE થીમ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #0ff;
  --primary-hover: #3cf;
  --primary-light: rgba(0,255,255,0.1);
  --primary-glow: 0 0 12px rgba(0,255,255,0.3);
  --bg: #0a0f1a;
  --bg-gradient: linear-gradient(135deg, #0a0f1a, #0a1a2a);
  --card: rgba(10,20,35,0.85);
  --card-border: 1px solid #2a4f6e;
  --card-glow: 0 0 8px rgba(0,255,255,0.08);
  --text: #cfddee;
  --text-muted: #6a8aaa;
  --text-dim: #4a6a8a;
  --border: #2a4f6e;
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.4);
  --radius: 12px;
  --radius-sm: 8px;
  --accent-purple: #a0f;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  color: var(--text);
  min-height: 100vh;
  padding-top: 56px;
}

/* ==================== NAVBAR ==================== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,20,35,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(0,255,255,0.1);
  display: flex; align-items: center;
  padding: 0 12px;
  height: 56px;
  gap: 4px;
}

.nav-toggle { display: none; }

.nav-hamburger {
  display: none;
  font-size: 24px; cursor: pointer; padding: 4px 8px;
  border-radius: 8px; user-select: none;
  touch-action: manipulation;
  color: var(--text-muted);
  -webkit-tap-highlight-color: transparent;
}
.nav-hamburger:hover { background: var(--primary-light); }
.nav-toggle:checked ~ .nav-hamburger { color: var(--primary); }
.nav-toggle:checked ~ .nav-hamburger::before { content: '✕'; }
.nav-hamburger::before { content: '☰'; }

.navbar .brand {
  font-size: 15px; font-weight: 700;
  white-space: nowrap; margin-right: auto;
  color: var(--text);
  text-decoration: none;
}
.navbar .brand span { color: var(--primary); }

.nav-menu {
  display: flex; align-items: center; gap: 4px;
}

.nav-link {
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px; font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all .2s;
  white-space: nowrap;
}
.nav-link:hover { background: var(--primary-light); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #000; font-weight: 700; }

/* ==================== RESPONSIVE — MOBILE ==================== */
@media (max-width: 768px) {
  .nav-hamburger { display: block; }
  .nav-menu {
    display: none;
    position: fixed; top: 56px; left: 0; right: 0;
    background: rgba(10,20,35,0.98);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    flex-direction: column;
    gap: 2px;
    z-index: 99;
    animation: slideDown .2s ease;
  }
  @keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }
  .nav-toggle:checked ~ .nav-menu { display: flex; }
  .nav-menu .nav-link {
    display: block;
    width: 100%; padding: 12px 16px;
    font-size: 15px; border-radius: 8px;
  }
}

@media (max-width: 480px) {
  .navbar .brand { font-size: 14px; }
  .navbar .brand span { display: none; }
}

/* ==================== MAIN CONTAINER ==================== */
.container { max-width: 1200px; margin: 0 auto; padding: 16px; }

/* ==================== CARDS ==================== */
.card {
  background: var(--card);
  border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-glow);
  padding: 16px;
  margin-bottom: 16px;
}
.card-header {
  font-size: 16px; font-weight: 600;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
  color: var(--primary);
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px; font-weight: 600;
  cursor: pointer; text-decoration: none;
  transition: all .2s;
  touch-action: manipulation;
  background: transparent;
  color: var(--text);
}
.btn-primary { background: var(--primary); color: #000; border-color: var(--primary); }
.btn-primary:hover { background: #3cf; box-shadow: var(--primary-glow); }
.btn-success { background: #0a6; color: white; border-color: #0a6; }
.btn-success:hover { background: #0c8; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--primary-light); border-color: var(--primary); }
.btn-danger { background: #a00; color: white; border-color: #a00; }
.btn-danger:hover { background: #c00; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* ==================== FORMS ==================== */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  margin-bottom: 4px; color: var(--text-muted);
}
.form-group input, .form-group select {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 16px; color: var(--text);
  background: rgba(10,20,35,0.6);
  transition: border-color .2s;
  -webkit-appearance: none; appearance: none;
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,255,255,.15);
}
.form-group input::placeholder { color: var(--text-dim); }
.form-row { display: flex; gap: 8px; flex-wrap: wrap; }
.form-row > * { flex: 1; min-width: 100px; }

/* ==================== GRID ==================== */
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.col-6 { flex: 1; min-width: 300px; }

/* ==================== TAGS ==================== */
.tag {
  display: inline-block;
  padding: 6px 12px; border-radius: 999px;
  font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all .15s;
  border: 1px solid var(--border);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.tag.on { background: var(--primary); color: #000; border-color: var(--primary); font-weight: 700; }
.tag.off { background: transparent; color: var(--text-muted); }
.tag.off:hover { background: var(--primary-light); color: var(--primary); }

/* ==================== TABLE ==================== */
.table-wrap {
  overflow-x: auto; overflow-y: hidden;
  border-radius: var(--radius);
  border: var(--card-border);
  box-shadow: var(--card-glow);
  -webkit-overflow-scrolling: touch;
}
table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 700px; background: var(--card); }
th {
  background: rgba(0,255,255,0.15);
  color: var(--primary);
  padding: 10px 6px; font-weight: 700; font-size: 12px;
  position: sticky; top: 0; text-align: center;
  border-bottom: 1px solid var(--border);
}
th:first-child {
  background: rgba(0,255,255,0.1);
  text-align: left; padding-left: 12px;
  position: sticky; left: 0; z-index: 2;
}
td:first-child {
  background: rgba(10,20,35,0.5);
  font-weight: 600;
  position: sticky; left: 0; z-index: 1;
}
td {
  padding: 6px 4px; border: 1px solid rgba(42,79,110,0.4);
  text-align: center; vertical-align: middle;
  cursor: pointer; transition: all .12s;
  min-width: 85px; height: 50px;
}
td:hover { box-shadow: inset 0 0 0 2px var(--primary); z-index: 2; }
td:active { background: var(--primary-light); }
td.break { background: rgba(10,20,35,0.3); cursor: default; font-weight: 600; color: var(--text-dim); }
td.break:hover { box-shadow: none; }
td.prayer { background: rgba(170,0,255,0.1); cursor: default; border-color: rgba(170,0,255,0.3); }
td.prayer:hover { box-shadow: none; }

/* ==================== LOAD BAR ==================== */
.load-bar {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 10px 14px; background: var(--card);
  border: var(--card-border); border-radius: var(--radius);
  box-shadow: var(--card-glow);
  align-items: center; margin-bottom: 16px;
}
.load-bar .label { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-right: 8px; }
.load-badge {
  padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 500; border: 1px solid transparent;
}
.load-badge.green { background: rgba(0,255,100,0.1); color: #0f6; border-color: rgba(0,255,100,0.3); }
.load-badge.yellow { background: rgba(255,200,0,0.1); color: #fc0; border-color: rgba(255,200,0,0.3); }
.load-badge.red { background: rgba(255,50,50,0.1); color: #f44; border-color: rgba(255,50,50,0.3); }

/* ==================== MODAL ==================== */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
  z-index: 200; align-items: center; justify-content: center; padding: 16px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: rgba(10,20,35,0.95);
  border: 1px solid var(--primary);
  border-radius: 16px; padding: 20px;
  width: 100%; max-width: 450px; max-height: 85vh; overflow-y: auto;
  box-shadow: 0 0 30px rgba(0,255,255,0.15);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; color: var(--primary); }
.modal .form-group { margin-bottom: 12px; }
.modal select { min-height: 44px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.modal-actions .btn { min-height: 44px; padding: 10px 20px; }

/* ==================== TOAST ==================== */
#toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  z-index: 300;
  padding: 14px 24px; border-radius: 10px;
  color: white; font-size: 14px; font-weight: 500;
  box-shadow: 0 0 20px rgba(0,0,0,.5);
  display: none; text-align: center;
  animation: slideUp .3s ease;
  max-width: 90vw;
}
#toast.show { display: block; }
#toast.success { background: #0a6; border: 1px solid #0f6; }
#toast.error { background: #a00; border: 1px solid #f44; }
#toast.info { background: rgba(0,255,255,0.2); color: var(--primary); border: 1px solid var(--primary); }
@keyframes slideUp { from { transform: translateY(20px) translateX(-50%); opacity: 0; } to { transform: translateY(0) translateX(-50%); opacity: 1; } }

/* ==================== LOADING SPINNER ==================== */
.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==================== UTILITY ==================== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.subj-color { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }

/* ==================== TEACHER CARD ==================== */
.teacher-card {
  display: flex; align-items: center;
  padding: 12px; background: rgba(10,20,35,0.4);
  border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 6px; gap: 8px; flex-wrap: wrap;
}
.teacher-card .tname { font-weight: 600; font-size: 14px; min-width: 100px; }

/* ==================== EMPTY STATE ==================== */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state .icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h2 { font-size: 18px; color: var(--text); margin-bottom: 8px; }
.empty-state p { margin-bottom: 16px; }

/* ==================== DAY CONFIG ==================== */
.day-row {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 12px; background: rgba(10,20,35,0.4);
  border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 6px; flex-wrap: wrap;
}
.day-row .dname { font-weight: 600; font-size: 14px; min-width: 70px; }
.day-row input { 
  width: 52px; text-align: center; padding: 6px 4px;
  border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px; min-height: 36px;
  background: rgba(10,20,35,0.6);
  color: var(--text);
}
.day-row .total { font-size: 13px; color: var(--text-muted); min-width: 55px; text-align: center; }
.copy-btn-day {
  padding: 6px 10px; font-size: 11px; border-radius: 6px;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-muted); cursor: pointer; min-height: 36px;
  touch-action: manipulation;
}
.copy-btn-day:hover { background: var(--primary); color: #000; border-color: var(--primary); }

/* ==================== SUBJECT GRID ==================== */
.subj-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.subj-card {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 8px;
  background: rgba(10,20,35,0.4);
  border: 1px solid var(--border);
  font-size: 13px; font-weight: 500;
  transition: all .2s;
}
.subj-card .del { cursor: pointer; color: var(--text-muted); font-weight: 700; padding: 4px; }
.subj-card .del:hover { color: #f44; }

/* ==================== CLASS BLOCK ==================== */
.cls-block {
  background: var(--card);
  border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-glow);
  margin-bottom: 12px;
  overflow: hidden;
}
.cls-header {
  display: flex; align-items: center; flex-wrap: wrap;
  padding: 10px 14px;
  background: rgba(0,255,255,0.1);
  color: var(--primary);
  font-weight: 700;
  font-size: 15px;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}
.cls-body { padding: 10px 14px; }
.cls-body .subj-tags { display: flex; flex-wrap: wrap; gap: 5px; align-items: center; }

/* ==================== MASTER TIMETABLE ==================== */
.view-tabs { display: flex; gap: 6px; margin-bottom: 12px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.view-tab {
  padding: 10px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--card);
  transition: all .2s; white-space: nowrap; flex-shrink: 0;
  touch-action: manipulation;
  color: var(--text-muted);
}
.view-tab.active { background: var(--primary); color: #000; border-color: var(--primary); font-weight: 700; }
.view-tab:not(.active):hover { background: var(--primary-light); color: var(--primary); }

.mini-tt, .tchr-tt {
  background: var(--card); border: var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--card-glow); overflow: hidden;
  margin-bottom: 12px;
}
.mini-tt .mheader, .tchr-tt .mheader {
  padding: 8px 12px; font-weight: 700; font-size: 14px;
}
.mini-tt .mheader { background: rgba(0,255,255,0.1); color: var(--primary); border-bottom: 1px solid var(--border); }
.tchr-tt .mheader { background: rgba(170,0,255,0.1); color: var(--accent-purple); border-bottom: 1px solid var(--border); }
.mini-tt table, .tchr-tt table { width: 100%; border-collapse: collapse; font-size: 11px; min-width: auto; background: transparent; }
.mini-tt th, .tchr-tt th { background: rgba(0,255,255,0.05); color: var(--text-muted); padding: 5px 3px; font-size: 10px; }
.mini-tt td, .tchr-tt td { padding: 3px 2px; min-width: auto; height: auto; font-size: 10px; border: 1px solid rgba(42,79,110,0.3); background: transparent; }
.mini-tt td .subj { font-weight: 600; display: block; font-size: 10px; }
.mini-tt td .tchr { font-size: 8px; color: var(--text-muted); }
.tchr-tt td .cls-name { font-weight: 600; font-size: 10px; display: block; }
.tchr-tt td .subj-name { font-size: 9px; color: var(--text-muted); }

.master-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .container { padding: 12px; }
  .navbar { padding: 0 8px; gap: 2px; }
  .navbar .brand { font-size: 14px; }
  .nav-link .nav-icon { display: none; }
  .nav-link { font-size: 12px; padding: 8px 8px; }
  .form-row > * { min-width: 100%; }
  .col-6 { min-width: 100%; }
  td { font-size: 11px; min-width: 70px; height: 42px; padding: 3px; }
  .empty-state { padding: 40px 16px; }
  .modal { padding: 16px; border-radius: 12px; margin: 8px; }
  .master-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .navbar .brand { font-size: 13px; }
  .nav-link { font-size: 11px; padding: 6px 6px; }
  .container { padding: 10px; }
  .card { padding: 12px; border-radius: 10px; }
  .card-header { font-size: 14px; }
  .btn { padding: 10px 14px; font-size: 13px; min-height: 44px; }
  .btn-sm { padding: 8px 10px; font-size: 12px; min-height: 36px; }
  .btn-lg { padding: 12px 20px; font-size: 15px; }
  .btn-group .btn { flex: 1; justify-content: center; }
  .form-group input, .form-group select { font-size: 16px; min-height: 44px; }
  table { min-width: 500px; font-size: 11px; }
  th { font-size: 10px; padding: 6px 3px; }
  td { min-width: 60px; height: 36px; padding: 2px; font-size: 10px; }
  .day-row { padding: 8px 10px; gap: 4px; }
  .day-row .dname { font-size: 13px; min-width: 60px; }
  .day-row input { width: 44px; font-size: 13px; min-height: 32px; }
  .teacher-card { padding: 10px; }
  .tag { font-size: 12px; padding: 5px 10px; }
  .cls-header { font-size: 14px; padding: 8px 12px; }
  .modal { padding: 14px; }
  #toast { font-size: 13px; padding: 12px 16px; bottom: 12px; max-width: 95vw; }
  .mini-tt .mheader, .tchr-tt .mheader { font-size: 12px; }
  .subj-card { padding: 6px 10px; font-size: 12px; }
  .load-bar { padding: 8px 10px; }
}

@media print {
  .navbar, .load-bar, #toast, .modal-overlay { display: none !important; }
  body { padding-top: 0; background: white; color: black; }
  .container { padding: 0; }
  td { height: auto; padding: 4px; }
}