.modal-loader {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid #e2d2c0;
  border-top-color: var(--accent);
  margin: 16px 0 10px;
  animation: spin 0.8s linear infinite;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  box-shadow: 0 10px 24px rgba(var(--accent-rgb), 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 28px rgba(var(--accent-rgb), 0.38);
  filter: brightness(1.05);
}

.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: none;
}

.button.secondary:hover {
  background: rgba(var(--accent-rgb), 0.08);
  box-shadow: none;
}

body.theme-dark .button.secondary {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.form-group {
  margin-bottom: 16px;
}

.language-picker {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px 12px;
  padding: 4px 0;
}

.language-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.language-option input {
  width: auto;
  margin: 0;
  accent-color: var(--accent);
}

input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  font-family: inherit;
  background: #fff;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.05);
}

body.theme-dark input,
body.theme-dark textarea,
body.theme-dark select {
  background: #0b1220;
  color: var(--ink);
  border-color: var(--border);
}

textarea {
  min-height: 120px;
}

.timeline {
  display: grid;
  gap: 10px;
}

.timeline-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
}

.timeline-item > :first-child {
  min-width: 0;
  flex: 1 1 auto;
}

.timeline-item > :not(:first-child) {
  flex: 0 0 auto;
}

body.theme-dark .timeline-item {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border);
}

.notifications-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.timeline-item.notification-item {
  display: block;
  padding: 0;
  border: none;
  background: transparent;
}

.timeline-item.notification-item > :first-child,
.timeline-item.notification-item > :not(:first-child) {
  min-width: 0;
  flex: initial;
}

.timeline-item.notification-item .notification-item-surface {
  padding: 12px 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
}

body.theme-dark .timeline-item.notification-item .notification-item-surface {
  background: rgba(15, 23, 42, 0.85);
  border-color: var(--border);
}

.timeline-item.notification-item.is-unread .notification-item-surface {
  border-color: rgba(76, 111, 255, 0.45);
  background: rgba(76, 111, 255, 0.08);
}

body.theme-dark .timeline-item.notification-item.is-unread .notification-item-surface {
  border-color: rgba(96, 165, 250, 0.56);
  background: rgba(96, 165, 250, 0.16);
}

.notifications-list .notification-item-body {
  white-space: pre-wrap;
}

.notifications-list-wrap .notifications-empty {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  padding: 8px 4px;
}

.notification-read-btn {
  padding: 6px 10px;
  min-height: 0;
  font-size: 10px;
  letter-spacing: 0.04em;
}

.dashboard-grid-primary {
  display: grid;
  gap: 20px;
  align-items: start;
  margin-top: 24px;
  min-width: 0;
}

.dashboard-page {
  max-width: min(1680px, calc(100vw - 32px));
  padding: 24px 16px 80px;
}

.dashboard-grid-primary > * {
  min-width: 0;
  max-width: 100%;
}

.dashboard-rail-card {
  position: relative;
  min-width: 0;
  max-width: 100%;
}

.dashboard-rail-shell {
  position: relative;
  min-width: 0;
  max-width: 100%;
}

.dashboard-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 320px);
  width: 100%;
  max-width: 100%;
  min-width: 0;
  gap: 18px;
  overflow-x: auto;
  overflow-y: visible;
  padding: 6px 0 12px;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  touch-action: pan-x;
}

.dashboard-rail > * {
  scroll-snap-align: start;
}

.dashboard-rail-nav {
  position: fixed;
  top: 50vh;
  z-index: 80;
  width: 40px;
  height: 76px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: pointer;
  transform: translateY(-50%);
  transition: opacity 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

@keyframes dashboard-rail-nav-click {
  0% {
    transform: translateY(-50%) scale(1);
  }
  38% {
    transform: translateY(-50%) scale(0.9);
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.11);
  }
  72% {
    transform: translateY(-50%) scale(1.06);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
  }
  100% {
    transform: translateY(-50%) scale(1);
  }
}

.dashboard-rail-nav.is-clicked {
  animation: dashboard-rail-nav-click 240ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.dashboard-rail-nav.is-prev {
  left: 6px;
}

.dashboard-rail-nav.is-next {
  right: 6px;
}

.dashboard-rail-nav span {
  font-size: 26px;
  line-height: 1;
}

.dashboard-rail-nav:hover,
.dashboard-rail-nav:focus-visible {
  transform: translateY(-50%) scale(1.02);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.18);
}

.dashboard-rail-nav:disabled {
  opacity: 0.38;
  cursor: default;
  transform: translateY(-50%);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
}

.dashboard-rail-nav[hidden] {
  display: none !important;
}

body.theme-dark .dashboard-rail-nav {
  background: rgba(11, 18, 32, 0.92);
  border-color: rgba(96, 165, 250, 0.2);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
}

.dashboard-rail::-webkit-scrollbar {
  height: 10px;
}

.dashboard-rail::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.45);
  border-radius: 999px;
}

.dashboard-course-card {
  width: 100%;
  max-width: none;
  min-width: 0;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.dashboard-course-body {
  flex: 1 1 auto;
}

.dashboard-course-tags {
  margin-bottom: 2px;
}

.dashboard-course-actions {
  margin-top: 14px;
}

.dashboard-course-actions .button,
.dashboard-course-actions form {
  width: 100%;
}

.dashboard-course-actions form {
  margin: 0;
}

.dashboard-course-actions form .button {
  width: 100%;
}

.dashboard-course-action-tag {
  display: inline-flex;
  justify-content: center;
  width: 100%;
}

.dashboard-rail-empty {
  margin: 0;
  color: var(--muted);
}

.dashboard-secondary {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}

.dashboard-submissions-card {
  max-width: 960px;
}

.dashboard-submissions-card .timeline-item {
  align-items: flex-start;
}

@media (max-width: 900px) {
  .dashboard-grid-primary {
    gap: 16px;
  }

  .dashboard-rail-shell {
    padding: 0;
  }

  .dashboard-rail {
    grid-auto-columns: minmax(82vw, 82vw);
  }
}

@media (hover: none), (pointer: coarse) {
  .dashboard-rail-nav {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dashboard-rail-nav.is-clicked {
    animation: none;
  }
}