/* ============================================================
   app.css  —  Umay Okul  |  Design System
   ============================================================ */

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; font-size: 14px; color: var(--text-primary); background: var(--bg-page); }

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  --blue:        #2B7BE0;
  --blue-lt:     #EBF3FD;
  --blue-dk:     #1558B0;
  --blue-mid:    #4A90D9;
  --green:       #16A97E;
  --green-lt:    #E6F7F2;
  --amber:       #F5A623;
  --amber-lt:    #FEF6E7;
  --red:         #E0392B;
  --red-lt:      #FDEDEB;

  --text-primary:   #1A202C;
  --text-secondary: #4A5568;
  --text-muted:     #A0AEC0;
  --text-inverse:   #FFFFFF;

  --bg-page:    #F4F6F9;
  --bg-card:    #FFFFFF;
  --bg-input:   #FFFFFF;
  --bg-hover:   #F7FAFC;
  --bg-active:  #EBF3FD;

  --border:     #E2E8F0;
  --border-focus: var(--blue);

  --radius-sm:  5px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:  0 4px 12px rgba(0,0,0,.08);
  --shadow-lg:  0 10px 30px rgba(0,0,0,.12);

  --topbar-h:   52px;
  --sidebar-w:  220px;
  --transition: .15s ease;
}

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Layout ──────────────────────────────────────────────── */
#app { display: none; height: 100vh; flex-direction: column; }

.topbar {
  height: var(--topbar-h); background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 18px; gap: 10px;
  flex-shrink: 0; z-index: 100;
  box-shadow: var(--shadow-sm);
}
.topbar-logo {
  font-size: 17px; font-weight: 800; letter-spacing: -.5px;
  color: var(--blue); white-space: nowrap;
}
.topbar-logo sup { font-size: 9px; font-weight: 500; color: var(--text-muted); vertical-align: super; }

.school-select-wrap { position: relative; }
.school-select {
  padding: 6px 30px 6px 10px; border: 1px solid var(--border);
  border-radius: var(--radius-md); font-size: 13px;
  background: var(--bg-page); color: var(--text-primary);
  cursor: pointer; appearance: none; min-width: 160px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234A5568' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center;
}

.topbar-nav { display: flex; gap: 2px; margin-left: 4px; }
.topbar-nav a {
  padding: 6px 13px; border-radius: var(--radius-md); font-size: 13px;
  color: var(--text-secondary); text-decoration: none; cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.topbar-nav a:hover  { background: var(--bg-hover); color: var(--text-primary); }
.topbar-nav a.active { background: var(--bg-active); color: var(--blue); font-weight: 600; }

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.role-badge {
  font-size: 11px; padding: 3px 9px; border-radius: 99px;
  background: var(--blue-lt); color: var(--blue-dk); font-weight: 500;
}
.avatar-btn {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-dk));
  color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600; flex-shrink: 0;
  transition: opacity var(--transition);
}
.avatar-btn:hover { opacity: .85; }

/* ── Main layout ─────────────────────────────────────────── */
.main-layout { display: flex; flex: 1; overflow: hidden; }

.sidebar {
  width: var(--sidebar-w); background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 10px 8px; display: flex; flex-direction: column;
  gap: 1px; flex-shrink: 0; overflow-y: auto;
}
.sidebar-section {
  font-size: 10px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-muted); padding: 12px 10px 5px; font-weight: 600;
}
.menu-item {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 10px; border-radius: var(--radius-md);
  font-size: 13px; color: var(--text-secondary);
  cursor: pointer; text-decoration: none; transition: background var(--transition), color var(--transition);
  border: none; background: none; width: 100%; text-align: left;
}
.menu-item:hover  { background: var(--bg-hover); color: var(--text-primary); }
.menu-item.active { background: var(--bg-active); color: var(--blue); font-weight: 600; }
.menu-item svg    { width: 16px; height: 16px; flex-shrink: 0; opacity: .8; }
.menu-item.active svg { opacity: 1; }
.menu-badge {
  margin-left: auto; font-size: 10px; padding: 1px 6px; border-radius: 99px;
  background: var(--red); color: #fff; font-weight: 600;
}

.content-area { flex: 1; overflow: auto; }

/* ── Page wrapper ────────────────────────────────────────── */
.page { padding: 24px; max-width: 1300px; }
.page-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
}
.page-title { font-size: 20px; font-weight: 700; color: var(--text-primary); }
.page-subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card-header {
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.card-title { font-size: 14px; font-weight: 600; }
.card-body  { padding: 18px; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg-card);
  color: var(--text-primary); text-decoration: none;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn:hover        { background: var(--bg-hover); }
.btn-primary      { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-primary:hover{ background: var(--blue-dk); border-color: var(--blue-dk); }
.btn-success      { background: var(--green); color: #fff; border-color: var(--green); }
.btn-danger       { background: var(--red); color: #fff; border-color: var(--red); }
.btn-ghost        { border-color: transparent; background: transparent; }
.btn-ghost:hover  { background: var(--bg-hover); }
.btn-sm           { padding: 4px 10px; font-size: 12px; }
.btn-xs           { padding: 2px 8px; font-size: 11px; }
.btn-icon         { padding: 6px; }
.btn svg          { width: 15px; height: 15px; flex-shrink: 0; }

/* ── Form ────────────────────────────────────────────────── */
.form-row  { display: grid; gap: 14px; margin-bottom: 14px; }
.form-row.col-2 { grid-template-columns: 1fr 1fr; }
.form-row.col-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-label { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.form-label .req { color: var(--red); margin-left: 2px; }
.form-control {
  padding: 8px 11px; border: 1px solid var(--border);
  border-radius: var(--radius-md); font-size: 13px;
  background: var(--bg-input); color: var(--text-primary);
  outline: none; transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(43,123,224,.12);
}
.form-control[type="color"] { padding: 3px 5px; height: 34px; cursor: pointer; }
select.form-control {
  appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234A5568' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
  padding-right: 30px;
}
.form-hint  { font-size: 11px; color: var(--text-muted); }
.form-error { font-size: 11px; color: var(--red); }

/* ── Table ───────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table thead tr { border-bottom: 2px solid var(--border); }
.data-table th {
  padding: 10px 14px; text-align: left;
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-muted); white-space: nowrap;
}
.data-table th.sortable { cursor: pointer; user-select: none; }
.data-table th.sortable:hover { color: var(--text-primary); }
.data-table td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tbody tr { transition: background var(--transition); }
.data-table tbody tr:hover { background: var(--bg-hover); }
.data-table tbody tr:last-child td { border-bottom: none; }

.col-actions { width: 120px; text-align: right; }
.col-badge   { width: 80px; }
.col-num     { width: 60px; text-align: center; }

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 99px;
}
.badge-blue   { background: var(--blue-lt); color: var(--blue-dk); }
.badge-green  { background: var(--green-lt); color: #0D6B50; }
.badge-amber  { background: var(--amber-lt); color: #9B6100; }
.badge-red    { background: var(--red-lt); color: #A02020; }
.badge-gray   { background: var(--bg-page); color: var(--text-muted); }
.dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.dot-green { background: var(--green); }
.dot-amber { background: var(--amber); }
.dot-red   { background: var(--red); }
.dot-gray  { background: var(--text-muted); }

/* ── Toolbar ─────────────────────────────────────────────── */
.toolbar {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.search-wrap { position: relative; }
.search-wrap svg {
  position: absolute; left: 9px; top: 50%; transform: translateY(-50%);
  width: 15px; height: 15px; color: var(--text-muted); pointer-events: none;
}
.search-input {
  padding: 7px 11px 7px 32px; border: 1px solid var(--border);
  border-radius: var(--radius-md); font-size: 13px; width: 220px;
  background: var(--bg-card); outline: none; transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--blue); }

/* ── Modal ───────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 16px;
  animation: fadeIn .15s ease;
}
.modal {
  background: var(--bg-card); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg); width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
  animation: slideUp .18s ease;
}
.modal-lg  { max-width: 720px; }
.modal-xl  { max-width: 960px; }
.modal-header {
  padding: 18px 20px 14px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.modal-title { font-size: 16px; font-weight: 700; flex: 1; }
.modal-close {
  width: 28px; height: 28px; border-radius: var(--radius-md);
  border: none; background: var(--bg-hover); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--text-secondary);
  transition: background var(--transition);
}
.modal-close:hover { background: var(--red-lt); color: var(--red); }
.modal-body   { padding: 20px; }
.modal-footer {
  padding: 14px 20px; border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: 8px;
}

@keyframes fadeIn  { from { opacity: 0 } to { opacity: 1 } }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0 } to { transform: translateY(0); opacity: 1 } }

/* ── Stats row ───────────────────────────────────────────── */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}
.stat-card .label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); margin-bottom: 6px; }
.stat-card .value { font-size: 26px; font-weight: 800; color: var(--text-primary); line-height: 1; }
.stat-card .sub   { font-size: 11px; color: var(--text-muted); margin-top: 4px; }
.stat-card.accent-blue  .value { color: var(--blue); }
.stat-card.accent-green .value { color: var(--green); }
.stat-card.accent-red   .value { color: var(--red); }
.stat-card.accent-amber .value { color: var(--amber); }

/* ── Color swatch ────────────────────────────────────────── */
.color-swatch {
  width: 14px; height: 14px; border-radius: 3px;
  display: inline-block; flex-shrink: 0; vertical-align: middle;
}

/* ── Timetable ───────────────────────────────────────────── */
.tt-wrap { padding: 20px; }
.tt-controls {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 16px; flex-wrap: wrap;
}
.view-tabs { display: flex; gap: 2px; background: var(--bg-page); padding: 3px; border-radius: var(--radius-md); }
.view-tab {
  padding: 5px 12px; border-radius: var(--radius-sm); font-size: 12px;
  font-weight: 500; cursor: pointer; color: var(--text-secondary);
  transition: background var(--transition), color var(--transition); border: none; background: none;
}
.view-tab.active { background: var(--bg-card); color: var(--blue); box-shadow: var(--shadow-sm); }

table.timetable { width: 100%; border-collapse: collapse; font-size: 12px; }
table.timetable th {
  background: var(--bg-page); padding: 9px 6px; text-align: center;
  border: 1px solid var(--border); font-weight: 700; font-size: 11px;
  text-transform: uppercase; letter-spacing: .05em; color: var(--text-secondary);
}
table.timetable td { border: 1px solid var(--border); padding: 3px; vertical-align: top; height: 60px; min-width: 100px; }
table.timetable td.time-col {
  background: var(--bg-page); text-align: center;
  font-size: 10px; color: var(--text-muted); font-weight: 600;
  min-width: 58px; max-width: 58px; line-height: 1.5;
}
.lesson-cell {
  border-radius: 5px; padding: 5px 7px; height: 100%;
  font-size: 11px; cursor: grab; display: flex; flex-direction: column;
  gap: 2px; transition: box-shadow var(--transition), opacity var(--transition);
  user-select: none;
}
.lesson-cell:active { cursor: grabbing; }
.lesson-cell:hover  { box-shadow: 0 2px 8px rgba(0,0,0,.12); }
.lesson-cell b      { font-weight: 600; font-size: 11px; }
.lesson-cell span   { font-size: 10px; opacity: .8; }
.lesson-cell.dragging { opacity: .4; }
.lesson-cell.drag-target { outline: 2px dashed var(--blue); outline-offset: -1px; background: var(--blue-lt); }
.break-row td { background: var(--bg-page); text-align: center; font-size: 11px; color: var(--text-muted); height: 24px !important; }

/* Ders renk sınıfları */
.lc-0 { background: #EBF3FD; color: #1558B0; }
.lc-1 { background: #EAF5EE; color: #1A6E3A; }
.lc-2 { background: #F0EEFE; color: #3730A3; }
.lc-3 { background: #FEF3E2; color: #92400E; }
.lc-4 { background: #E0F5EF; color: #065F46; }
.lc-5 { background: #FEE9E7; color: #991B1B; }
.lc-6 { background: #FDE8F4; color: #9D174D; }
.lc-7 { background: #E8F8FD; color: #0E7490; }
.lc-8 { background: #F0FDE4; color: #3F6212; }
.lc-9 { background: #FEFCE8; color: #854D0E; }

/* ── Constraint grid ─────────────────────────────────────── */
.constraint-grid { display: grid; grid-template-columns: 70px repeat(8, 1fr); gap: 3px; font-size: 11px; }
.cg-header { font-weight: 600; text-align: center; color: var(--text-muted); padding: 4px 2px; }
.cg-label  { font-weight: 600; color: var(--text-secondary); display: flex; align-items: center; font-size: 11px; }
.cg-cell {
  aspect-ratio: 1; border-radius: 4px; border: 1px solid var(--border);
  background: var(--bg-card); cursor: pointer; transition: all .1s ease;
  display: flex; align-items: center; justify-content: center; font-size: 9px;
}
.cg-cell:hover  { background: var(--amber-lt); border-color: var(--amber); }
.cg-cell.unavailable { background: var(--red-lt); border-color: var(--red); color: var(--red); }
.cg-cell.preferred   { background: var(--green-lt); border-color: var(--green); color: var(--green); }

/* ── Import/Export ───────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius-lg);
  padding: 36px; text-align: center; cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--blue); background: var(--blue-lt);
}
.drop-zone svg   { width: 36px; height: 36px; color: var(--text-muted); margin-bottom: 10px; }
.drop-zone p     { font-size: 13px; color: var(--text-secondary); }
.drop-zone small { font-size: 11px; color: var(--text-muted); }

/* ── Toast ───────────────────────────────────────────────── */
.toast-wrap {
  position: fixed; bottom: 20px; right: 20px; z-index: 2000;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius-lg);
  background: var(--text-primary); color: #fff;
  box-shadow: var(--shadow-lg); font-size: 13px; font-weight: 500;
  min-width: 240px; max-width: 360px;
  animation: toastIn .2s ease;
}
.toast.success { background: var(--green); }
.toast.error   { background: var(--red); }
.toast.warning { background: var(--amber); color: var(--text-primary); }
.toast svg { width: 18px; height: 18px; flex-shrink: 0; }
@keyframes toastIn { from { transform: translateX(20px); opacity: 0 } to { transform: translateX(0); opacity: 1 } }

/* ── Empty state ─────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 56px 20px;
  color: var(--text-muted);
}
.empty-state svg  { width: 48px; height: 48px; margin: 0 auto 14px; opacity: .4; }
.empty-state h3   { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state p    { font-size: 13px; margin-bottom: 18px; }

/* ── Loading ─────────────────────────────────────────────── */
.loading-wrap { display: flex; align-items: center; justify-content: center; padding: 60px; color: var(--text-muted); gap: 10px; }
.spinner { width: 22px; height: 22px; border: 2px solid var(--border); border-top-color: var(--blue); border-radius: 50%; animation: spin .65s linear infinite; flex-shrink: 0; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Progress bar ────────────────────────────────────────── */
.progress { height: 8px; background: var(--bg-page); border-radius: 99px; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 99px; background: var(--blue); transition: width .4s ease; }
.progress-bar.success { background: var(--green); }
.progress-bar.warning { background: var(--amber); }
.progress-bar.danger  { background: var(--red); }

/* ── Offline banner ──────────────────────────────────────── */
#offline-banner {
  display: none; background: var(--amber); color: #fff;
  text-align: center; padding: 7px; font-size: 12px; font-weight: 500;
}

/* ── Print ───────────────────────────────────────────────── */
@media print {
  .topbar, .sidebar, .toolbar, .btn, .tt-controls { display: none !important; }
  .content-area { overflow: visible !important; }
  table.timetable { font-size: 10px; }
  .lesson-cell { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 52px; }
  .sidebar .menu-item span, .sidebar-section, .menu-badge { display: none; }
  .menu-item { justify-content: center; padding: 10px; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .form-row.col-3 { grid-template-columns: 1fr; }
  .topbar-nav { display: none; }
}