/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --success: #34a853;
  --warning: #f9a825;
  --danger: #e53935;
  --purple: #9c27b0;
  --sidebar-w: 240px;
  --topbar-h: 60px;
  --bg: #f0f4f8;
  --card-bg: #ffffff;
  --text: #202124;
  --text-muted: #5f6368;
  --border: #e0e0e0;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
  --transition: .2s ease;
}

html { font-size: 15px; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }
a { color: var(--primary); text-decoration: none; }

/* ===== LAYOUT ===== */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: linear-gradient(180deg, #1a237e 0%, #283593 100%);
  color: #fff;
  display: flex; flex-direction: column;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 20px 16px 16px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.sidebar-logo {
  display: flex; align-items: center; gap: 10px;
}

.logo-icon { font-size: 2rem; }

.logo-text {
  display: flex; flex-direction: column; line-height: 1.2;
}

.logo-title { font-size: 1.2rem; font-weight: 700; letter-spacing: .5px; }
.logo-sub { font-size: .75rem; opacity: .7; text-transform: uppercase; letter-spacing: 1px; }

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

.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background var(--transition);
  margin-bottom: 2px;
  font-size: .9rem;
}

.nav-item:hover { background: rgba(255,255,255,.12); }
.nav-item.active { background: rgba(255,255,255,.2); font-weight: 600; }

.nav-icon { font-size: 1.1rem; width: 22px; text-align: center; }
.nav-label { white-space: nowrap; }

.sidebar-footer {
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: .78rem;
  opacity: .7;
}

.sidebar-school-info { display: flex; flex-direction: column; gap: 2px; }
.school-year { font-size: .72rem; }

/* Main Wrapper */
.main-wrapper {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex; flex-direction: column;
}

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

.menu-toggle {
  display: none;
  background: none; border: none;
  font-size: 1.4rem; color: var(--text);
  padding: 4px 8px;
}

.page-title {
  font-size: 1.1rem; font-weight: 600;
  flex: 1;
}

.topbar-date {
  font-size: .82rem; color: var(--text-muted);
  white-space: nowrap;
}

/* Content */
.content {
  flex: 1;
  padding: 24px;
  overflow-x: hidden;
}

/* Views */
.view { display: none; }
.view.active { display: block; }

/* ===== CARDS & SECTIONS ===== */
.section-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap; gap: 8px;
}

.section-title {
  font-size: 1rem; font-weight: 600;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  font-size: .875rem; font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary { background: #f1f3f4; color: var(--text); }
.btn-secondary:hover { background: #e0e0e0; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #2d9248; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c62828; }

.btn-link { background: none; border: none; color: var(--primary); padding: 4px 8px; font-size: .85rem; }
.btn-link:hover { text-decoration: underline; }

.btn-sm { padding: 5px 12px; font-size: .8rem; }

.btn-icon {
  background: none; border: none;
  font-size: 1rem; padding: 4px 6px;
  border-radius: 6px;
  transition: background var(--transition);
}
.btn-icon:hover { background: #f1f3f4; }

.btn-icon-round {
  background: #f1f3f4; border: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  font-size: 1.2rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.btn-icon-round:hover { background: var(--primary-light); color: var(--primary); }

/* ===== FORMS ===== */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: .82rem; font-weight: 500; margin-bottom: 5px; color: var(--text-muted); }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: .9rem;
  background: #fff;
  color: var(--text);
  transition: border-color var(--transition);
  outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,.12);
}

.form-textarea { resize: vertical; min-height: 80px; }
.form-color { padding: 4px; height: 42px; cursor: pointer; }

.form-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}

/* ===== MODALS ===== */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  align-items: center; justify-content: center;
  padding: 16px;
}

.modal-backdrop.active { display: flex; }

.modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%; max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn .2s ease;
}

.modal-sm { max-width: 380px; }

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-16px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 1rem; font-weight: 600; }

.modal-close {
  background: none; border: none;
  font-size: 1.4rem; color: var(--text-muted);
  line-height: 1; padding: 2px 6px;
  border-radius: 6px;
  transition: background var(--transition);
}
.modal-close:hover { background: #f1f3f4; }

.modal-body { padding: 18px 20px; }

.modal-footer {
  display: flex; justify-content: flex-end; gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  margin-top: 14px;
}

/* ===== DASHBOARD ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  display: flex; align-items: center; gap: 14px;
  border-left: 4px solid transparent;
}

.stat-card.blue  { border-color: var(--primary); }
.stat-card.green { border-color: var(--success); }
.stat-card.yellow{ border-color: var(--warning); }
.stat-card.purple{ border-color: var(--purple); }

.stat-icon { font-size: 2rem; }
.stat-value { font-size: 1.8rem; font-weight: 700; line-height: 1; }
.stat-label { font-size: .78rem; color: var(--text-muted); margin-top: 2px; }

/* Quick Actions */
.quick-actions {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}

.quick-btn {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 16px 12px;
  border-radius: 10px;
  border: none;
  font-size: .85rem; font-weight: 500;
  transition: all var(--transition);
}

.quick-btn.blue   { background: var(--primary-light); color: var(--primary); }
.quick-btn.yellow { background: #fff8e1; color: #f57f17; }
.quick-btn.green  { background: #e8f5e9; color: #2e7d32; }
.quick-btn.purple { background: #f3e5f5; color: #6a1b9a; }
.quick-btn:hover  { filter: brightness(.95); transform: translateY(-2px); box-shadow: var(--shadow); }

.quick-icon { font-size: 1.5rem; }

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.dashboard-grid .section-card:last-child {
  grid-column: 1 / -1;
}

/* Event Items */
.event-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 8px;
  border-bottom: 1px solid #f5f5f5;
  cursor: pointer;
  transition: background var(--transition);
  border-radius: 8px;
}
.event-item:hover { background: #f8f9fa; }
.event-item:last-child { border-bottom: none; }

.event-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.event-info { flex: 1; min-width: 0; }
.event-title { font-size: .9rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.event-meta { font-size: .78rem; color: var(--text-muted); margin-top: 2px; display: flex; gap: 4px; align-items: center; }
.event-badge { font-size: .72rem; padding: 2px 8px; border-radius: 20px; white-space: nowrap; }

/* Schedule Items */
.schedule-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 8px;
  border-radius: 8px;
  border-bottom: 1px solid #f5f5f5;
}
.schedule-item:last-child { border-bottom: none; }

.schedule-period {
  display: flex; flex-direction: column; align-items: center;
  min-width: 44px;
}
.period-num { font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.period-time { font-size: .68rem; color: var(--text-muted); }

.schedule-info { flex: 1; }
.schedule-subject { font-size: .9rem; font-weight: 500; }
.schedule-teacher { font-size: .78rem; color: var(--text-muted); }

.teacher-dot { width: 10px; height: 10px; border-radius: 50%; }

/* Doc Items */
.doc-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 8px;
  border-radius: 8px;
  cursor: pointer;
  border-bottom: 1px solid #f5f5f5;
  transition: background var(--transition);
}
.doc-item:hover { background: #f8f9fa; }
.doc-item:last-child { border-bottom: none; }

.doc-icon { font-size: 1.4rem; }
.doc-info { flex: 1; min-width: 0; }
.doc-name { font-size: .88rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc-meta { font-size: .75rem; color: var(--text-muted); }
.doc-category-badge { font-size: .72rem; background: #f1f3f4; padding: 2px 8px; border-radius: 20px; white-space: nowrap; }

/* ===== CALENDAR ===== */
.calendar-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
  align-items: start;
}

.cal-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}

.cal-month-year { font-size: 1.05rem; font-weight: 600; }

.cal-filter-row {
  display: flex; gap: 10px; margin-bottom: 12px;
}
.cal-filter-row .form-select { flex: 1; }

.cal-header-row {
  display: grid; grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: .75rem; font-weight: 600;
  color: var(--text-muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

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

.cal-day {
  min-height: 80px;
  padding: 4px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
}

.cal-day:hover { background: #f8f9fa; }
.cal-day.other-month { opacity: .35; }
.cal-day.today .day-num {
  background: var(--primary); color: #fff;
  border-radius: 50%; width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
}
.cal-day.selected { background: var(--primary-light); }

.day-num {
  font-size: .82rem; font-weight: 500;
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px;
  margin-bottom: 2px;
}

.cal-events-list { display: flex; flex-direction: column; gap: 1px; }

.cal-event {
  font-size: .65rem;
  color: #fff;
  padding: 1px 4px;
  border-radius: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.cal-more { font-size: .65rem; color: var(--text-muted); padding-left: 2px; }

/* Event List Panel */
.event-list-panel .section-card { height: fit-content; }

.event-list-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid #f5f5f5;
}
.event-list-item:last-child { border-bottom: none; }

.event-list-color { width: 4px; border-radius: 2px; min-height: 40px; flex-shrink: 0; }
.event-list-body { flex: 1; min-width: 0; }
.event-list-title { font-size: .9rem; font-weight: 500; }
.event-list-meta { font-size: .75rem; color: var(--text-muted); margin-top: 3px; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.event-list-desc { font-size: .78rem; color: var(--text-muted); margin-top: 4px; }
.event-list-actions { display: flex; gap: 2px; }

.event-cat-tag {
  font-size: .7rem; padding: 2px 7px; border-radius: 20px; font-weight: 500;
}

/* Event Detail */
.event-detail-header {
  padding: 12px 14px;
  background: #f8f9fa;
  border-radius: 8px;
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.event-detail-header h3 { font-size: 1rem; font-weight: 600; flex: 1; }
.event-detail-body { display: flex; flex-direction: column; gap: 10px; }
.detail-row { display: flex; gap: 8px; font-size: .88rem; }
.detail-row span { color: var(--text-muted); min-width: 100px; }
.event-detail-actions { display: flex; gap: 10px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }

/* ===== REMINDER ===== */
.reminder-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; flex-wrap: wrap; gap: 10px;
}

.reminder-stats-row { display: flex; gap: 8px; flex-wrap: wrap; }

.reminder-stat-chip {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .8rem;
}
.reminder-stat-chip.active { border-color: var(--success); color: var(--success); }
.reminder-stat-chip.done   { border-color: var(--text-muted); color: var(--text-muted); }

.filter-bar {
  display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap;
}
.filter-bar .form-input { flex: 1; min-width: 180px; }
.filter-bar .form-select { min-width: 140px; }

.reminder-list { display: flex; flex-direction: column; gap: 12px; }

.reminder-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.reminder-card:hover { box-shadow: var(--shadow-md); }
.reminder-card.completed { opacity: .7; }
.reminder-card.overdue { border: 1.5px solid #ffcdd2; }

.reminder-priority-bar { width: 5px; flex-shrink: 0; }
.reminder-body { flex: 1; padding: 14px 16px; }

.reminder-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.reminder-title-row { display: flex; align-items: center; gap: 8px; flex: 1; }
.reminder-icon { font-size: 1rem; }
.reminder-title { font-size: .95rem; font-weight: 600; }
.reminder-title.strikethrough { text-decoration: line-through; color: var(--text-muted); }

.overdue-badge {
  background: #ffebee; color: var(--danger);
  font-size: .7rem; padding: 2px 8px; border-radius: 20px; font-weight: 600;
}

.reminder-badges { display: flex; gap: 6px; flex-wrap: wrap; }

.priority-badge, .status-badge {
  font-size: .72rem; padding: 3px 9px; border-radius: 20px; font-weight: 500;
}
.status-badge.active { background: #e8f5e9; color: var(--success); }
.status-badge.done   { background: #f5f5f5; color: var(--text-muted); }

.reminder-datetime { font-size: .8rem; color: var(--text-muted); display: flex; gap: 12px; margin-bottom: 6px; }
.reminder-desc { font-size: .82rem; color: var(--text-muted); margin-bottom: 10px; }
.reminder-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== UPLOAD ===== */
.drop-zone {
  background: var(--card-bg);
  border: 2.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: 16px;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

.drop-zone-content { pointer-events: none; }
.drop-icon { font-size: 3rem; margin-bottom: 10px; }
.drop-zone h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.drop-zone p { font-size: .85rem; color: var(--text-muted); }
.drop-hint { font-size: .78rem !important; margin-top: 4px; }

.doc-stats-row {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px;
}
.doc-stat-chip {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .8rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.doc-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px;
  transition: box-shadow var(--transition);
}
.doc-card:hover { box-shadow: var(--shadow-md); }

.doc-card-icon {
  width: 52px; height: 52px; border-radius: 10px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.4rem; gap: 2px;
}
.doc-card-icon small { font-size: .6rem; font-weight: 600; }

.doc-card-body { flex: 1; min-width: 0; }
.doc-card-name { font-size: .88rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 4px; }
.doc-card-desc { font-size: .78rem; color: var(--text-muted); margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.doc-card-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; font-size: .75rem; color: var(--text-muted); }
.doc-cat-badge { background: #f1f3f4; padding: 2px 8px; border-radius: 20px; font-size: .7rem; }
.doc-size, .doc-date { white-space: nowrap; }

.doc-card-actions { display: flex; flex-direction: column; gap: 4px; }

/* ===== SCHEDULE ===== */
.schedule-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  align-items: start;
}

.teacher-panel .section-card { position: sticky; top: calc(var(--topbar-h) + 24px); }

.teacher-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 8px;
  border-radius: 8px;
  border-bottom: 1px solid #f5f5f5;
  transition: background var(--transition);
}
.teacher-item:hover { background: #f8f9fa; }
.teacher-item:last-child { border-bottom: none; }

.teacher-color-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.teacher-info { flex: 1; min-width: 0; }
.teacher-name { font-size: .88rem; font-weight: 500; }
.teacher-subject { font-size: .75rem; color: var(--text-muted); }
.teacher-actions { display: flex; gap: 2px; }

.schedule-toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}
.schedule-toolbar .form-select { min-width: 120px; }

.schedule-table-wrapper { overflow-x: auto; }

.schedule-table {
  width: 100%; border-collapse: collapse;
  font-size: .82rem;
  min-width: 600px;
}

.schedule-table th {
  background: #f8f9fa;
  padding: 10px 8px;
  text-align: center;
  font-weight: 600;
  border: 1px solid var(--border);
  white-space: nowrap;
}

.period-header { width: 90px; }

.schedule-table td { border: 1px solid var(--border); vertical-align: top; }

.period-cell {
  padding: 8px;
  background: #fafafa;
  text-align: center;
  white-space: nowrap;
}
.period-label { font-weight: 600; font-size: .82rem; }
.period-time-label { font-size: .68rem; color: var(--text-muted); }

.schedule-cell {
  padding: 6px;
  min-height: 70px;
  position: relative;
}

.schedule-cell.empty {
  cursor: pointer;
  transition: background var(--transition);
}
.schedule-cell.empty:hover { background: var(--primary-light); }

.add-hint {
  display: flex; align-items: center; justify-content: center;
  height: 100%; min-height: 60px;
  font-size: .75rem; color: var(--text-muted);
  opacity: 0;
  transition: opacity var(--transition);
}
.schedule-cell.empty:hover .add-hint { opacity: 1; }

.schedule-cell.filled { cursor: default; }

.cell-subject { font-weight: 600; font-size: .8rem; margin-bottom: 2px; }
.cell-teacher { font-size: .72rem; color: var(--text-muted); }
.cell-class { font-size: .7rem; color: var(--text-muted); }

.cell-actions {
  display: none;
  gap: 2px;
  margin-top: 4px;
}
.schedule-cell.filled:hover .cell-actions { display: flex; }

.cell-btn {
  background: rgba(255,255,255,.8);
  border: none;
  border-radius: 4px;
  font-size: .75rem;
  padding: 2px 4px;
  cursor: pointer;
}
.cell-btn:hover { background: #fff; }

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 24px 16px;
  color: var(--text-muted);
}
.empty-state.large { padding: 48px 16px; }
.empty-icon { font-size: 2.5rem; margin-bottom: 10px; }
.empty-state h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.empty-state p { font-size: .85rem; margin-bottom: 14px; }

/* ===== TOAST ===== */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 999;
  display: flex; flex-direction: column; gap: 8px;
}

.toast {
  display: flex; align-items: center; gap: 10px;
  background: #323232;
  color: #fff;
  padding: 12px 16px;
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  min-width: 260px; max-width: 360px;
  opacity: 0;
  transform: translateX(20px);
  transition: all .3s ease;
}
.toast.show { opacity: 1; transform: translateX(0); }

.toast-success { background: #1b5e20; }
.toast-error   { background: #b71c1c; }
.toast-warning { background: #e65100; }
.toast-info    { background: #0d47a1; }

.toast-icon { font-size: 1rem; }
.toast-message { flex: 1; font-size: .85rem; }
.toast-close { background: none; border: none; color: rgba(255,255,255,.7); font-size: 1.1rem; padding: 0 2px; cursor: pointer; }
.toast-close:hover { color: #fff; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .dashboard-grid .section-card:last-child { grid-column: auto; }
  .calendar-layout { grid-template-columns: 1fr; }
  .schedule-layout { grid-template-columns: 1fr; }
  .teacher-panel .section-card { position: static; }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    transform: translateX(-240px);
    width: 240px;
  }
  .sidebar.open { transform: translateX(0); }

  .main-wrapper { margin-left: 0; }

  .menu-toggle { display: block; }

  .content { padding: 16px; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

  .quick-actions { grid-template-columns: repeat(2, 1fr); }

  .form-row { grid-template-columns: 1fr; }

  .cal-day { min-height: 56px; }
  .cal-event { display: none; }
  .cal-day.has-events::after {
    content: '●';
    font-size: .5rem;
    color: var(--primary);
    display: block;
    text-align: center;
  }

  .doc-grid { grid-template-columns: 1fr; }

  .schedule-toolbar { gap: 6px; }
  .schedule-toolbar .form-select { min-width: 100px; font-size: .78rem; }

  .filter-bar { flex-direction: column; }
  .filter-bar .form-input,
  .filter-bar .form-select { width: 100%; }

  .reminder-toolbar { flex-direction: column; align-items: flex-start; }

  .topbar-date { display: none; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-value { font-size: 1.4rem; }
  .quick-actions { grid-template-columns: 1fr 1fr; }
  .modal { max-width: 100%; }
}

/* ===== PRINT ===== */
@media print {
  .sidebar, .topbar, .schedule-toolbar, .teacher-panel,
  .cell-actions, .btn, .filter-bar { display: none !important; }
  .main-wrapper { margin-left: 0; }
  .schedule-main { width: 100%; }
  .schedule-table { font-size: .75rem; }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #aaa; }

/* ===== SPLASH SCREEN ===== */
.splash-screen {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.splash-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

.splash-content {
  text-align: center;
  color: #fff;
  animation: splashIn 0.6s ease forwards;
}

@keyframes splashIn {
  from { opacity: 0; transform: scale(0.85) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.splash-logo {
  font-size: 5rem;
  margin-bottom: 16px;
  display: block;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,.3));
  animation: splashBounce 1.2s ease infinite alternate;
}

@keyframes splashBounce {
  from { transform: translateY(0); }
  to   { transform: translateY(-8px); }
}

.splash-school {
  font-size: 2rem; font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 6px;
  text-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.splash-subtitle {
  font-size: 1rem; opacity: .8;
  letter-spacing: 3px; text-transform: uppercase;
  margin-bottom: 40px;
}

.splash-progress-track {
  width: 220px; height: 4px;
  background: rgba(255,255,255,.2);
  border-radius: 2px;
  margin: 0 auto 12px;
  overflow: hidden;
}

.splash-progress-bar {
  height: 100%;
  background: #fff;
  border-radius: 2px;
  width: 0%;
  transition: width 0.8s ease;
}

.splash-loading-text {
  font-size: .8rem; opacity: .6;
  letter-spacing: 1px;
}

/* ===== LOGIN PAGE ===== */
.login-page {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
  display: flex; align-items: center; justify-content: center;
  z-index: 9000;
  padding: 16px;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.login-page.visible { opacity: 1; }

.login-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  padding: 36px 32px 28px;
  width: 100%; max-width: 400px;
}

.login-card.shake {
  animation: loginShake 0.5s ease;
}

@keyframes loginShake {
  0%, 100% { transform: translateX(0); }
  15%       { transform: translateX(-8px); }
  30%       { transform: translateX(8px); }
  45%       { transform: translateX(-6px); }
  60%       { transform: translateX(6px); }
  75%       { transform: translateX(-3px); }
  90%       { transform: translateX(3px); }
}

.login-header {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 10px;
}

.login-school-name {
  font-size: 1.4rem; font-weight: 800;
  color: #1a237e;
  margin-bottom: 4px;
}

.login-school-sub {
  font-size: .82rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 2px;
}

/* Error banner */
.login-error {
  display: flex; align-items: center; gap: 8px;
  background: #ffebee; color: #c62828;
  border: 1px solid #ffcdd2;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .85rem; font-weight: 500;
  margin-bottom: 16px;
}

/* Fields */
.login-field {
  margin-bottom: 18px;
}

.login-label {
  display: block;
  font-size: .82rem; font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.login-input-wrap {
  position: relative;
  display: flex; align-items: center;
}

.login-input-icon {
  position: absolute; left: 12px;
  font-size: 1rem; pointer-events: none;
  line-height: 1;
}

.login-input {
  width: 100%;
  padding: 11px 12px 11px 38px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: .95rem;
  color: var(--text);
  background: #fafafa;
  outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}

.login-input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(26,115,232,.12);
}

.login-input-pw { padding-right: 44px; }

.login-toggle-pw {
  position: absolute; right: 10px;
  background: none; border: none;
  font-size: 1rem; cursor: pointer;
  padding: 4px;
  opacity: .6;
  transition: opacity .2s;
}
.login-toggle-pw:hover { opacity: 1; }

.login-field-error {
  display: block;
  font-size: .78rem; color: var(--danger);
  margin-top: 4px; min-height: 16px;
}

/* Submit button */
.login-submit-btn {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, #1a237e, #1a73e8);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 1rem; font-weight: 700;
  letter-spacing: .5px;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 4px;
}

.login-submit-btn:hover:not(:disabled) {
  opacity: .92;
  transform: translateY(-1px);
}

.login-submit-btn:disabled {
  opacity: .65; cursor: not-allowed;
}

/* Spinner inside button */
.login-spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Hint */
.login-hint {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: .78rem; color: var(--text-muted);
  line-height: 1.8;
}

.login-hint code {
  background: #f1f3f4;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: .78rem;
  color: #1a237e;
  font-weight: 600;
}

/* ===== TOPBAR USER INFO ===== */
.topbar-user-info {
  display: flex; align-items: center; gap: 12px;
}

.topbar-user-name {
  font-size: .82rem; color: var(--text-muted);
  white-space: nowrap;
}

.btn-logout {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px;
  background: #ffebee; color: #c62828;
  border: 1px solid #ffcdd2;
  border-radius: 8px;
  font-size: .8rem; font-weight: 600;
  cursor: pointer;
  transition: background .2s;
  white-space: nowrap;
}
.btn-logout:hover { background: #ffcdd2; }

@media (max-width: 480px) {
  .login-card { padding: 28px 20px 22px; }
  .login-school-name { font-size: 1.2rem; }
  .topbar-user-name { display: none; }
}