:root {
  color-scheme: light;
  --ink: #0b0d12;
  --ink-soft: #1c2230;
  --muted: #566079;
  --violet: #6e4dff;
  --blue: #3a7dff;
  --white: #f7f8ff;
  --surface: #ffffff;
  --surface-2: #eff1ff;
  --stroke: rgba(12, 18, 30, 0.12);
  --shadow: 0 20px 50px rgba(11, 13, 18, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Lexend", system-ui, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, rgba(110, 77, 255, 0.2), transparent 45%),
    radial-gradient(circle at 30% 30%, rgba(58, 125, 255, 0.18), transparent 50%),
    var(--white);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--violet);
}

.glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 80% 20%, rgba(110, 77, 255, 0.15), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(58, 125, 255, 0.12), transparent 45%);
  z-index: -1;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  animation: fade-up 0.5s ease-out;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  position: sticky;
  top: 0;
  background: rgba(247, 248, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(12, 18, 30, 0.08);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "Space Grotesk", sans-serif;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--muted);
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: linear-gradient(140deg, rgba(110, 77, 255, 0.25), rgba(58, 125, 255, 0.2));
  border: 2px solid var(--ink);
  position: relative;
}

.logo-mark::after {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 2px;
  background: var(--ink);
  transform: translateX(-50%);
}

.logo-mark.large {
  width: 54px;
  height: 54px;
}

.nav {
  display: flex;
  gap: 16px;
  background: var(--surface);
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  box-shadow: 0 8px 18px rgba(11, 13, 18, 0.08);
}

.nav-link {
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
}

.nav-link.is-active {
  background: var(--ink);
  color: var(--white);
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-name {
  font-size: 0.9rem;
  color: var(--muted);
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--violet), var(--blue));
  color: var(--white);
  box-shadow: 0 12px 24px rgba(58, 125, 255, 0.25);
}

.btn.ghost {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--stroke);
}

.btn.small {
  padding: 8px 14px;
  font-size: 0.85rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  padding: 24px;
}

.empty-state {
  text-align: center;
}

.page-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 28px;
  align-items: center;
}

.page-hero.compact {
  align-items: start;
}

.hero-copy h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 2.8vw, 2.8rem);
  margin: 8px 0 12px;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0;
}

.subtext {
  color: var(--muted);
  font-size: 1rem;
  max-width: 480px;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-card h2 {
  margin-top: 0;
  font-family: "Space Grotesk", sans-serif;
}

.pulse-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 6px;
}

.value {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.muted {
  color: var(--muted);
}

.muted.small {
  font-size: 0.85rem;
}

.focus-form {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
}

.focus-form input {
  flex: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--stroke);
  padding: 10px 12px;
  font-family: inherit;
}

.focus-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  gap: 10px;
}

.focus-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}

.focus-item label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.focus-item input[type="checkbox"] {
  accent-color: var(--violet);
}

.focus-item .remove {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.block-list {
  display: grid;
  gap: 12px;
}

.block {
  display: flex;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(12, 18, 30, 0.2);
  background: rgba(58, 125, 255, 0.06);
}

.tip {
  font-size: 1rem;
  margin-top: 0;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 8px 12px;
  background: rgba(110, 77, 255, 0.12);
  border-radius: 999px;
  font-size: 0.9rem;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(12, 18, 30, 0.08);
}

.setting-row:last-child {
  border-bottom: none;
}

.score {
  font-size: 2.4rem;
  font-weight: 700;
  margin: 6px 0;
}

.leaderboard-card {
  margin-top: 12px;
}

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

.leaderboard-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.leaderboard-row.is-you {
  border: 2px solid rgba(110, 77, 255, 0.5);
  background: rgba(110, 77, 255, 0.15);
}

.rank {
  font-weight: 700;
}

.ladder-card {
  margin-top: 12px;
}

.ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.ladder-row {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.ladder-row.is-reached {
  border: 1px solid rgba(58, 125, 255, 0.4);
}

.ladder-row.is-current {
  background: rgba(58, 125, 255, 0.18);
}

.ladder-marker {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--white);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.progress {
  background: rgba(12, 18, 30, 0.1);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  margin: 12px 0;
}

.progress span {
  display: block;
  height: 100%;
  background: linear-gradient(135deg, var(--violet), var(--blue));
}

.auth {
  min-height: calc(100vh - 100px);
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.auth-card {
  max-width: 420px;
  text-align: center;
}

.form {
  display: grid;
  gap: 14px;
  margin: 20px 0 10px;
}

.field {
  display: grid;
  gap: 6px;
  text-align: left;
}

.field input {
  border-radius: var(--radius-sm);
  border: 1px solid var(--stroke);
  padding: 10px 12px;
  font-family: inherit;
}

.alert {
  background: rgba(110, 77, 255, 0.15);
  color: var(--ink-soft);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .nav {
    flex-wrap: wrap;
  }

  .user-pill {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 600px) {
  .page {
    padding: 24px 16px 60px;
  }

  .topbar {
    padding: 16px 20px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

.focus-empty {
  color: var(--muted);
  font-size: 0.9rem;
}

.brand-inline {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-family: "Space Grotesk", sans-serif;
}

.brand-inline .brand-name {
  font-size: 1.6rem;
  font-weight: 700;
}

.home-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
}

.home-list li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.home-list li::before {
  content: "•";
  color: var(--violet);
  font-weight: 700;
  margin-top: 2px;
}

.link {
  font-size: 0.85rem;
  color: var(--muted);
}

.link:hover {
  color: var(--violet);
}

.leaderboard.compact .leaderboard-row {
  grid-template-columns: 28px 1fr auto;
  padding: 10px 12px;
}

.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.dropdown-caret {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid currentColor;
  transition: transform 0.2s ease;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 220px;
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  padding: 12px;
  display: none;
  z-index: 20;
}

.dropdown-empty {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.dropdown.is-open .dropdown-menu {
  display: block;
}

.dropdown.is-open .dropdown-caret {
  transform: rotate(180deg);
}

.profile {
  position: relative;
}

.profile-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--surface);
  cursor: pointer;
  font-family: "Space Grotesk", sans-serif;
}

.profile-button .user-name {
  color: var(--ink);
  font-size: 0.9rem;
}

.profile-button:hover {
  box-shadow: 0 10px 20px rgba(11, 13, 18, 0.12);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-2);
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--ink);
  font-weight: 600;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.avatar-initial {
  font-size: 0.9rem;
}

.avatar-large {
  width: 72px;
  height: 72px;
  font-size: 1.4rem;
}

.profile-menu {
  right: 0;
  min-width: 200px;
  padding: 8px;
}

.dropdown-menu form {
  margin: 0;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  background: none;
  border-radius: 12px;
  font-size: 0.95rem;
  color: var(--ink);
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
}

.dropdown-item:hover {
  background: var(--surface-2);
}

.dropdown-item.danger {
  color: #b03a3a;
}

.dropdown-item .icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
}

.settings-card {
  max-width: 680px;
}

.settings-form {
  display: grid;
  gap: 18px;
}

.settings-row {
  display: grid;
  gap: 12px;
}

.avatar-upload {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.file-field input[type="file"] {
  font-family: inherit;
}

.alert.success {
  background: rgba(58, 125, 255, 0.15);
}

.icon-button {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--ink);
}

.icon-button:hover {
  background: var(--surface-2);
}

.icon-plus {
  font-weight: 600;
  line-height: 1;
}

.file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.control-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.control-form {
  display: grid;
  gap: 16px;
}

.toggle-row {
  display: grid;
  gap: 8px;
}

.toggle-list {
  display: grid;
  gap: 12px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-ui {
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: rgba(12, 18, 30, 0.15);
  position: relative;
  transition: background 0.2s ease;
}

.toggle-ui::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  transition: transform 0.2s ease;
  box-shadow: 0 4px 10px rgba(11, 13, 18, 0.2);
}

.toggle input:checked + .toggle-ui {
  background: linear-gradient(135deg, var(--violet), var(--blue));
}

.toggle input:checked + .toggle-ui::after {
  transform: translateX(18px);
}

.divider {
  height: 1px;
  background: rgba(12, 18, 30, 0.08);
  margin: 4px 0;
}

.user-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.user-meta {
  display: grid;
  gap: 4px;
  min-width: 0;
  flex: 1;
}

.user-name,
.user-email {
  font-size: 0.9rem;
}

.user-email {
  color: var(--muted);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.status-pill {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(58, 125, 255, 0.16);
}

.status-pill.ok {
  background: rgba(58, 125, 255, 0.16);
}

.status-pill.danger {
  background: rgba(176, 58, 58, 0.18);
  color: #b03a3a;
}

.status-pill.admin {
  background: rgba(110, 77, 255, 0.2);
}

.status-pill.neutral {
  background: rgba(12, 18, 30, 0.12);
  color: var(--muted);
}

.truncate {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 700px) {
  .user-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .user-actions {
    width: 100%;
    justify-content: space-between;
  }

  .truncate {
    max-width: 100%;
  }
}

.profile-button .user-name {
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subject-dropdown {
  position: relative;
}

.subject-panel {
  left: 0;
  right: auto;
  width: min(520px, 92vw);
  min-width: 260px;
  padding: 0;
  display: none;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.subject-panel.has-boards {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.subject-dropdown.is-open .subject-panel {
  display: grid;
}

.dropdown-column {
  padding: 12px;
}

.dropdown-column + .dropdown-column {
  border-left: 1px solid var(--stroke);
}

.dropdown-column.is-hidden {
  display: none;
}

.dropdown-title {
  margin: 0 0 8px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.dropdown-list {
  display: grid;
  gap: 6px;
  max-height: 240px;
  overflow-y: auto;
}

.dropdown-option {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  color: var(--ink);
}

.dropdown-option:hover,
.dropdown-option.is-selected {
  background: var(--surface-2);
}

@media (max-width: 700px) {
  .subject-panel,
  .subject-panel.has-boards {
    grid-template-columns: minmax(0, 1fr);
  }

  .dropdown-column + .dropdown-column {
    border-left: none;
    border-top: 1px solid var(--stroke);
  }
}

.progression-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.progression-card.is-locked {
  opacity: 0.65;
}

.progression-card.is-today {
  border-color: rgba(110, 77, 255, 0.6);
  box-shadow: 0 16px 30px rgba(110, 77, 255, 0.18);
}

.progression-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.progression-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}

.lock-icon {
  width: 24px;
  height: 24px;
  display: inline-flex;
  color: var(--muted);
}

.lock-icon svg {
  width: 24px;
  height: 24px;
}

.quiz-form {
  display: grid;
  gap: 18px;
}

.quiz-card {
  display: grid;
  gap: 12px;
}

.quiz-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.quiz-question {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.1rem;
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--stroke);
  background: var(--surface-2);
  cursor: pointer;
}

.quiz-option input {
  accent-color: var(--violet);
}

.quiz-input,
.quiz-textarea {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--stroke);
  padding: 10px 12px;
  font-family: inherit;
}

.quiz-textarea {
  resize: vertical;
  min-height: 120px;
}

.review-card {
  border-left: 4px solid var(--stroke);
}

.review-card.is-correct {
  border-left-color: var(--blue);
}

.review-card.is-incorrect {
  border-left-color: #b03a3a;
}

.review-card.is-review {
  border-left-color: var(--violet);
}

.review-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}