/* ── Reset & Base ─────────────────────────────────────── */
:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --accent: #4f46e5;
  --accent-light: #eef2ff;
  --accent-hover: #4338ca;
  --success: #059669;
  --success-light: #ecfdf5;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #dc2626;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.04);
  --transition: 150ms cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 0;
}

/* ── Top Bar ─────────────────────────────────────────── */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.topbar .brand svg { color: var(--accent); }
.topbar .nav-link {
  color: var(--text-secondary);
  font-size: .875rem;
  font-weight: 500;
  padding: .375rem .75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-decoration: none;
}
.topbar .nav-link:hover,
.topbar .nav-link.active {
  color: var(--accent);
  background: var(--accent-light);
}

/* ── Page Layout ─────────────────────────────────────── */
.page-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}
.page-header {
  margin-bottom: 2rem;
}
.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -.01em;
}
.page-header p {
  color: var(--text-secondary);
  margin: .25rem 0 0;
  font-size: .9rem;
}

/* ── Cards ───────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}
.school-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.school-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #d1d5db;
}
.school-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: .75rem;
}
.school-name {
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
  line-height: 1.3;
}
.school-id {
  font-size: .75rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: .15rem .5rem;
  border-radius: 4px;
  font-weight: 500;
  white-space: nowrap;
}
.school-status {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .8rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  padding: .5rem .75rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
}
.school-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-green { background: var(--success); }
.dot-yellow { background: var(--warning); }
.dot-gray { background: var(--text-muted); }

.school-actions {
  display: flex;
  gap: .5rem;
  margin-top: auto;
  padding-top: .75rem;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn-primary-custom {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  line-height: 1.4;
}
.btn-primary-custom:hover { background: var(--accent-hover); color: #fff; }

.btn-secondary-custom {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  line-height: 1.4;
}
.btn-secondary-custom:hover {
  background: var(--bg);
  color: var(--text);
  border-color: #d1d5db;
}

.btn-success-custom {
  background: var(--success);
  color: #fff;
  border: none;
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  line-height: 1.4;
}
.btn-success-custom:hover { background: #047857; color: #fff; }

.btn-sm-custom {
  padding: .375rem .75rem;
  font-size: .75rem;
}

.btn-block { width: 100%; justify-content: center; }

/* ── Alerts ──────────────────────────────────────────── */
.alert-custom {
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
}
.alert-success-custom {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid #a7f3d0;
}
.alert-error-custom {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}
.alert-warning-custom {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid #fde68a;
}

/* ── Form Controls ───────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .375rem;
}
.form-input {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .1);
}
select.form-input { cursor: pointer; }

/* ── Upload Drop Zone ────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg);
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}
.upload-zone svg {
  color: var(--text-muted);
  margin-bottom: .5rem;
}
.upload-zone p {
  margin: 0;
  font-size: .85rem;
  color: var(--text-secondary);
}
.upload-zone .file-name {
  font-weight: 600;
  color: var(--accent);
  margin-top: .5rem;
}

/* ── Schedule Table ──────────────────────────────────── */
.schedule-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: .8125rem;
}
.schedule-table th {
  text-align: left;
  padding: .5rem .75rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.schedule-table td {
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.schedule-table tr:last-child td { border-bottom: none; }
.schedule-table .no-schedule { color: var(--text-muted); }

/* ── Teacher Cards ───────────────────────────────────── */
.teacher-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: .75rem;
}
.teacher-card-header {
  padding: .75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}
.teacher-card-header:hover { background: var(--bg); }
.teacher-name {
  font-weight: 600;
  font-size: .875rem;
}
.teacher-id-badge {
  font-size: .7rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: .1rem .4rem;
  border-radius: 4px;
  margin-left: .5rem;
  font-weight: 500;
}
.teacher-card-body {
  padding: 0 1rem 1rem;
}

/* ── Section Surface ─────────────────────────────────── */
.surface {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.surface-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.surface-header h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

/* ── Copy Bar ────────────────────────────────────────── */
.copy-bar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.25rem;
  background: var(--accent-light);
  border: 1px solid #c7d2fe;
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.copy-bar label {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.copy-bar select,
.copy-bar input[type="number"] {
  padding: .375rem .5rem;
  border: 1px solid #c7d2fe;
  border-radius: 6px;
  font-size: .8125rem;
  background: #fff;
  color: var(--text);
  font-family: inherit;
}

/* ── Empty State ─────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}
.empty-state svg { color: var(--text-muted); margin-bottom: 1rem; }
.empty-state h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 .25rem;
  color: var(--text);
}
.empty-state p {
  font-size: .85rem;
  margin: 0 0 1rem;
}

/* ── Modal ───────────────────────────────────────────── */
.modal-content { border-radius: var(--radius); border: none; }
.modal-header { border-bottom: 1px solid var(--border); padding: 1rem 1.25rem; }
.modal-header .modal-title { font-size: 1rem; font-weight: 600; }
.modal-body { padding: 1.25rem; }
.modal-footer { border-top: 1px solid var(--border); padding: .75rem 1.25rem; }

/* ── Misc ────────────────────────────────────────────── */
.badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 .4rem;
  border-radius: 999px;
  font-size: .7rem;
  font-weight: 700;
  background: var(--accent-light);
  color: var(--accent);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 1.5rem 0;
}

/* ── Tool Launcher Grid ─────────────────────────────── */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  max-width: 700px;
  margin: 0 auto;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
  border-left: 4px solid var(--tool-color, var(--accent));
}
.tool-card:hover {
  box-shadow: var(--shadow-md);
  border-color: #d1d5db;
  border-left-color: var(--tool-color, var(--accent));
  transform: translateY(-1px);
  color: var(--text);
}
.tool-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--tool-color, var(--accent));
}
.tool-card-content {
  flex: 1;
  min-width: 0;
}
.tool-card-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 .25rem;
}
.tool-card-content p {
  font-size: .8rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
}
.tool-card-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.tool-card:hover .tool-card-arrow {
  transform: translateX(3px);
  color: var(--accent);
}

/* ── Login Page ─────────────────────────────────────── */
.login-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
  text-align: center;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-md);
}
.login-logo {
  margin-bottom: 1.25rem;
}
.login-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 .375rem;
}
.login-subtitle {
  font-size: .875rem;
  color: var(--text-secondary);
  margin: 0 0 2rem;
}
.login-btn-microsoft {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1.5rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  width: 100%;
  justify-content: center;
}
.login-btn-microsoft:hover {
  background: var(--bg);
  border-color: #d1d5db;
  box-shadow: var(--shadow-sm);
  color: var(--text);
}
.login-footer {
  font-size: .75rem;
  color: var(--text-muted);
  margin: 1.5rem 0 0;
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
  .page-container { padding: 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .copy-bar { flex-direction: column; align-items: stretch; }
  .login-container { padding: 2rem 1.5rem; }
}