/* Bristol LMS — Professional UI polish (v3 — School Ledger) */

/* System font stack — no render-blocking Google Fonts @import.
   Keeps first paint fast; looks still clean and modern on every OS. */
:root {
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ===== Dashboard canvas — theme-tinted, quiet ===== */
body.dashboard-layout {
  background:
    radial-gradient(ellipse 80% 50% at 100% -10%, color-mix(in srgb, var(--theme-primary) 7%, transparent), transparent 50%),
    radial-gradient(ellipse 60% 40% at 0% 100%, color-mix(in srgb, var(--theme-accent) 6%, transparent), transparent 45%),
    var(--bg);
}

body.dashboard-layout .content {
  animation: bls-fade-up 0.35s ease both;
}

@keyframes bls-fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Focus-visible rings ===== */
.btn:focus-visible,
.action-btn:focus-visible,
.tb-icon:focus-visible,
.menu-toggle:focus-visible,
.sb-item:focus-visible,
.filter-chip:focus-visible,
.add-btn:focus-visible,
.logout-btn:focus-visible,
.modal-close:focus-visible,
.bls-mobile-bar a:focus-visible {
  box-shadow: var(--focus-ring);
}

/* ===== Sidebar ===== */
.sidebar {
  background: linear-gradient(180deg, var(--theme-sidebar) 0%, color-mix(in srgb, var(--theme-sidebar) 92%, #000) 100%);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.sb-logo-box {
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.sb-item {
  border-radius: var(--radius-sm);
  position: relative;
}

.sb-item.active {
  background: rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.sb-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--theme-accent);
  border-radius: 0 3px 3px 0;
}

.sb-badge {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.sb-avatar {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

/* ===== Topbar ===== */
.topbar {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: 0 1px 0 var(--border), var(--shadow-sm);
}

.topbar h2 {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.tb-icon {
  border-radius: var(--radius-sm);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.tb-icon:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ===== Welcome bar — theme-only (tenant-safe) ===== */
.welcome-bar {
  background: linear-gradient(
    135deg,
    var(--theme-primary) 0%,
    color-mix(in srgb, var(--theme-primary) 82%, #000) 70%,
    color-mix(in srgb, var(--theme-primary) 70%, var(--theme-accent)) 100%
  );
  box-shadow: var(--shadow-md);
  border: 1px solid color-mix(in srgb, var(--theme-on-primary) 12%, transparent);
  position: relative;
  overflow: hidden;
}

.welcome-bar::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--theme-on-primary) 10%, transparent) 0%, transparent 70%);
  pointer-events: none;
}

.welcome-bar::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: 10%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--theme-accent) 22%, transparent) 0%, transparent 70%);
  pointer-events: none;
}

.welcome-bar > * {
  position: relative;
  z-index: 1;
}

.w-stat {
  background: color-mix(in srgb, var(--theme-on-primary) 8%, transparent);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--theme-on-primary) 12%, transparent);
  min-width: 72px;
}

/* ===== Stat cards ===== */
.stat-card {
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--theme-primary), var(--theme-accent));
  opacity: 0.9;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sc-icon {
  border-radius: var(--radius-sm);
}

/* ===== School Ledger — section cards (signature) ===== */
.sec-card {
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-lg);
  position: relative;
  background: var(--surface);
}

.sec-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--theme-accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  z-index: 1;
}

.sec-header {
  background: color-mix(in srgb, var(--surface-elevated) 85%, var(--bg));
  border-bottom: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== List items ===== */
.list-item {
  border-radius: 0;
  margin: 0;
}

.list-item:hover {
  background: color-mix(in srgb, var(--theme-primary) 4%, var(--surface));
}

.li-icon {
  border-radius: var(--radius-sm);
}

/* ===== Assignment cards ===== */
.assign-card {
  border: none;
  box-shadow: var(--shadow-sm);
}

.assign-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.assign-card h5 {
  font-size: 15px;
  letter-spacing: -0.01em;
}

/* ===== Buttons ===== */
.btn {
  border-radius: var(--radius-sm);
  letter-spacing: 0.01em;
}

.btn-primary {
  box-shadow: 0 2px 8px color-mix(in srgb, var(--theme-primary) 28%, transparent);
}

.btn-primary:hover {
  box-shadow: 0 4px 14px color-mix(in srgb, var(--theme-primary) 32%, transparent);
}

.btn-gold {
  box-shadow: 0 2px 8px color-mix(in srgb, var(--theme-accent) 35%, transparent);
}

.add-btn {
  border-radius: var(--radius-sm);
  background: var(--theme-primary);
  color: var(--theme-on-primary);
  box-shadow: 0 2px 10px color-mix(in srgb, var(--theme-primary) 28%, transparent);
  transition: transform var(--transition), box-shadow var(--transition);
}

.add-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

/* ===== Filters & search ===== */
.filter-chip {
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

.filter-chip:not(.active):hover {
  background: color-mix(in srgb, var(--theme-primary) 8%, var(--surface));
  color: var(--theme-primary);
  border-color: color-mix(in srgb, var(--theme-primary) 25%, var(--border));
}

.search-box input {
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  border-color: transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.search-box input:focus {
  border-color: var(--theme-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--theme-primary) 12%, transparent);
}

/* ===== Forms ===== */
.form-control {
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

/* ===== School Ledger — data tables (signature) ===== */
.data-table th {
  background: color-mix(in srgb, var(--theme-primary) 5%, var(--surface-elevated));
  border-bottom: 2px solid color-mix(in srgb, var(--theme-accent) 55%, var(--border));
  position: relative;
}

.data-table td {
  border-bottom-color: var(--border-light);
}

.data-table tr:hover td {
  background: var(--hover-tint);
}

.data-table tr:nth-child(even) td {
  background: color-mix(in srgb, var(--bg) 45%, var(--surface));
}

.data-table tr:nth-child(even):hover td {
  background: var(--hover-tint);
}

/* ===== Progress bars ===== */
.prog-bar {
  height: 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--border) 80%, var(--bg));
}

.prog-fill {
  border-radius: 999px;
  background: linear-gradient(90deg, var(--theme-primary), color-mix(in srgb, var(--theme-primary) 65%, var(--theme-accent))) !important;
}

/* ===== Modals ===== */
.modal {
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.modal-header h3 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* ===== Toasts (enhanced in main.css) ===== */

/* ===== Notifications list ===== */
.list-item.unread {
  animation: bls-notif-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
  border-left: 3px solid var(--theme-accent);
}

.list-item.unread .li-info h5::after {
  animation: bls-pulse-badge 2s ease infinite;
}

@keyframes bls-notif-in {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes bls-pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@keyframes bls-bell-shake {
  0%, 100% { transform: rotate(0); }
  15% { transform: rotate(12deg); }
  30% { transform: rotate(-10deg); }
  45% { transform: rotate(8deg); }
  60% { transform: rotate(-6deg); }
  75% { transform: rotate(3deg); }
}

.bls-bell-shake {
  animation: bls-bell-shake 0.55s ease;
}

.bls-bell-shake .notif-dot {
  animation: bls-dot-pop 0.5s ease;
}

@keyframes bls-dot-pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* ===== Dark mode v2 ===== */
html[data-theme="dark"] .sidebar {
  background: linear-gradient(180deg, #0a0f1e 0%, #060912 100%);
  border-right-color: rgba(255, 255, 255, 0.04);
}

html[data-theme="dark"] .stat-card,
html[data-theme="dark"] .sec-card,
html[data-theme="dark"] .assign-card {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04), var(--shadow-sm);
}

html[data-theme="dark"] .stat-card::after {
  background: linear-gradient(90deg, var(--theme-primary), var(--theme-accent));
  opacity: 1;
}

html[data-theme="dark"] .welcome-bar {
  background: linear-gradient(
    135deg,
    var(--theme-primary) 0%,
    color-mix(in srgb, var(--theme-primary) 75%, #000) 100%
  );
}

html[data-theme="dark"] .topbar {
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  border-bottom-color: var(--border);
}

html[data-theme="dark"] .search-box input {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
}

html[data-theme="dark"] .filter-chip:not(.active) {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text-muted);
}

html[data-theme="dark"] .portal-card {
  background: var(--surface);
  border: 1px solid var(--border);
}

html[data-theme="dark"] .stats-portal {
  background: var(--surface);
}

html[data-theme="dark"] .list-item.unread {
  background: color-mix(in srgb, var(--theme-primary) 8%, var(--surface));
}

html[data-theme="dark"] .toast-success {
  background: linear-gradient(135deg, #1b5e3a, #2E7D52);
}

html[data-theme="dark"] .toast-error {
  background: linear-gradient(135deg, #8b2020, #C62828);
}

html[data-theme="dark"] .toast-info {
  background: linear-gradient(135deg, #0a1628, #1B2E6B);
}

/* ===== Mobile & PWA ===== */
@media (max-width: 767px) {
  .toast-container {
    top: auto;
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    left: 16px;
    right: 16px;
    max-width: none;
  }

  .toast {
    animation-name: toastSlideUp;
    font-size: 14px;
    padding: 16px 18px;
    min-height: 52px;
  }

  .toast.toast-exit {
    animation-name: toastSlideDown;
  }

  @keyframes toastSlideUp {
    from { opacity: 0; transform: translateY(100%) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
  }

  @keyframes toastSlideDown {
    to { opacity: 0; transform: translateY(100%) scale(0.95); }
  }

  body.pwa-standalone .content {
    padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  }

  body.pwa-standalone .filter-bar {
    position: sticky;
    top: calc(var(--topbar-height) - 1px);
    z-index: 40;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin: -4px -16px 16px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
  }

  body.pwa-standalone .topbar {
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  }

  .stat-card:active,
  .assign-card:active,
  .portal-card:active {
    transform: scale(0.98);
  }

  .sb-item {
    min-height: 48px;
    font-size: 14px;
  }

  .btn, .login-btn, .tb-icon, .menu-toggle {
    -webkit-tap-highlight-color: transparent;
  }

  .welcome-bar {
    padding: 18px 20px;
  }

  .welcome-stats {
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .w-stat {
    min-width: 64px;
    padding: 8px 12px;
  }
}

/* Mobile bottom quick bar (PWA standalone only) */
.bls-mobile-bar {
  display: none;
}

@media (max-width: 767px) {
  body.pwa-standalone.dashboard-layout .bls-mobile-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 90;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom, 0px));
    justify-content: space-around;
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.08);
  }

  body.pwa-standalone.dashboard-layout .main {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px));
  }

  body.pwa-standalone.dashboard-layout .toast-container {
    bottom: calc(72px + env(safe-area-inset-bottom, 0px));
  }
}

.bls-mobile-bar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  min-width: 56px;
  transition: color 0.2s, background 0.2s;
}

.bls-mobile-bar a i {
  font-size: 22px;
}

.bls-mobile-bar a.active {
  color: var(--theme-primary);
  background: color-mix(in srgb, var(--theme-primary) 10%, transparent);
}

.bls-mobile-bar a:active {
  transform: scale(0.94);
}

/* ===== Dark mode refinements ===== */
html[data-theme="dark"] body.dashboard-layout {
  background:
    radial-gradient(ellipse 80% 50% at 100% -10%, color-mix(in srgb, var(--theme-primary) 14%, transparent), transparent 50%),
    radial-gradient(ellipse 60% 40% at 0% 100%, color-mix(in srgb, var(--theme-accent) 6%, transparent), transparent 45%),
    var(--bg);
}

html[data-theme="dark"] .topbar {
  background: color-mix(in srgb, var(--surface) 92%, transparent);
}

html[data-theme="dark"] .stat-card::after {
  opacity: 1;
}

html[data-theme="dark"] .sec-card::before {
  opacity: 0.9;
}

html[data-theme="dark"] .data-table th {
  background: color-mix(in srgb, var(--theme-primary) 12%, var(--surface-elevated));
}

html[data-theme="dark"] .data-table tr:nth-child(even) td {
  background: color-mix(in srgb, var(--bg) 55%, var(--surface));
}

html[data-theme="dark"] .welcome-bar {
  border-color: rgba(255, 255, 255, 0.06);
}

html[data-theme="dark"] .bls-mobile-bar {
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  border-top-color: var(--border);
}

html[data-theme="dark"] .sidebar {
  background: linear-gradient(180deg, var(--theme-sidebar) 0%, color-mix(in srgb, var(--theme-sidebar) 88%, #000) 100%);
}

/* Hardcoded navy/gray inline colors → readable on dark canvas */
html[data-theme="dark"] .content h1,
html[data-theme="dark"] .content h2,
html[data-theme="dark"] .content h3,
html[data-theme="dark"] .content h4,
html[data-theme="dark"] .content h5,
html[data-theme="dark"] .content h6,
html[data-theme="dark"] .content label,
html[data-theme="dark"] .content .meta,
html[data-theme="dark"] .content .due,
html[data-theme="dark"] .content .act-info h5,
html[data-theme="dark"] .content .act-info p,
html[data-theme="dark"] .content .msg-item,
html[data-theme="dark"] .content .cl-empty,
html[data-theme="dark"] .content .an-empty,
html[data-theme="dark"] .content .nt-empty,
html[data-theme="dark"] .content .empty-state p {
  color: var(--text);
}
html[data-theme="dark"] .content .meta,
html[data-theme="dark"] .content .due,
html[data-theme="dark"] .content .act-info p,
html[data-theme="dark"] .content .act-time,
html[data-theme="dark"] .content .cl-empty,
html[data-theme="dark"] .content .an-empty,
html[data-theme="dark"] .content .nt-empty,
html[data-theme="dark"] .content .empty-state p,
html[data-theme="dark"] .content .li-info p {
  color: var(--text-muted);
}
html[data-theme="dark"] .content [style*="color:#888"],
html[data-theme="dark"] .content [style*="color: #888"],
html[data-theme="dark"] .content [style*="color:#666"],
html[data-theme="dark"] .content [style*="color: #666"],
html[data-theme="dark"] .content [style*="color:#AAA"],
html[data-theme="dark"] .content [style*="color:#aaa"],
html[data-theme="dark"] .content [style*="color:#555"],
html[data-theme="dark"] .content [style*="color:#333"] {
  color: var(--text-muted) !important;
}
html[data-theme="dark"] .content [style*="color:#1B2E6B"],
html[data-theme="dark"] .content [style*="color:#0F1D45"],
html[data-theme="dark"] .content [style*="color:#0A0F1E"] {
  color: #B8C4E8 !important;
}
html[data-theme="dark"] .content [style*="color:#2E7D52"] {
  color: #6BCB8A !important;
}
html[data-theme="dark"] .content [style*="background:#FAFBFF"],
html[data-theme="dark"] .content [style*="background:#F0F3FF"],
html[data-theme="dark"] .content [style*="background:#E8F0FF"] {
  background: var(--surface-elevated) !important;
}
html[data-theme="dark"] .sec-header .link,
html[data-theme="dark"] .add-link {
  color: #B8C4E8;
}
html[data-theme="dark"] .modal {
  background: var(--surface);
  color: var(--text);
}
html[data-theme="dark"] .modal-header h3,
html[data-theme="dark"] .modal-body,
html[data-theme="dark"] .modal-body p,
html[data-theme="dark"] .modal-body strong {
  color: var(--text);
}
html[data-theme="dark"] .modal-body p {
  color: var(--text-muted);
}
html[data-theme="dark"] .msg-item h5,
html[data-theme="dark"] .msg-detail h4,
html[data-theme="dark"] .msg-detail p {
  color: var(--text);
}
html[data-theme="dark"] .msg-item p,
html[data-theme="dark"] .msg-item .msg-time {
  color: var(--text-muted);
}

/* ===== Empty & loading ===== */
.empty-state {
  padding: 56px 24px;
}

.empty-state i {
  opacity: 0.35;
}

.bls-loading {
  color: var(--text-muted);
  font-size: 13px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.bls-loading::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--theme-primary);
  border-radius: 50%;
  animation: bls-spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  body.dashboard-layout .content,
  .stat-card,
  .assign-card,
  .portal-card,
  .btn-primary:hover,
  .list-item.unread,
  .list-item.unread .li-info h5::after,
  .toast,
  .bls-bell-shake,
  .bls-bell-shake .notif-dot,
  .bls-loading::before,
  .skeleton {
    animation: none !important;
    transform: none !important;
  }

  html.theme-switching,
  html.theme-switching * {
    transition: none !important;
  }
}