:root {
  --base-color-red-500: #e60023;
  --base-color-red-600: #c0001c;
  --base-color-plum-900: #211922;
  --base-color-olive-700: #62625b;
  --base-color-olive-500: #91918c;
  --base-color-sand-300: #e5e5e0;
  --base-color-sand-200: #f6f6f3;
  --base-color-sand-150: #fbfaf8;
  --base-color-border: #c8c8c1;
  --base-color-dark: #33332e;
  --base-color-focus: #435ee5;
  --base-color-white: #ffffff;
  --warm-wash: hsla(60, 20%, 98%, 0.5);
  --ink: var(--base-color-plum-900);
  --paper: var(--base-color-sand-150);
  --muted: var(--base-color-olive-700);
  --border: var(--base-color-border);
  --card-bg: var(--base-color-white);
  --gold: var(--base-color-red-500);
  --blue: var(--base-color-focus);
  --font-pin: "Pin Sans", -apple-system, system-ui, "Segoe UI", Roboto, "Oxygen Sans", Ubuntu,
    Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Helvetica, Arial,
    "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei",
    "Helvetica Neue", sans-serif;
  --container-max: 1480px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-pill: 999px;
  --surface-shadow: 0 10px 24px rgba(33, 25, 34, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-pin);
  font-size: 16px;
  line-height: 1.4;
  background: linear-gradient(180deg, #ffffff, var(--base-color-sand-150));
  color: var(--base-color-plum-900);
}

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

img {
  max-width: 100%;
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(var(--container-max), calc(100% - 32px));
  margin: 0 auto;
}

.flash-stack {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: grid;
  gap: 10px;
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.flash-stack.is-hidden {
  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;
}

.flash {
  min-width: 280px;
  max-width: 360px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(33, 25, 34, 0.08);
  background: rgba(255, 255, 255, 0.98);
  color: var(--base-color-plum-900);
  box-shadow: var(--surface-shadow);
  font-size: 14px;
}

.flash-success {
  border-color: rgba(16, 60, 37, 0.15);
}

.flash-error {
  border-color: rgba(158, 10, 10, 0.16);
}

.flash-info {
  border-color: rgba(67, 94, 229, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1.2px;
  color: var(--base-color-plum-900);
}

.brand span {
  color: var(--base-color-red-500);
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 14px;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--base-color-plum-900);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  transition: background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

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

.btn:focus-visible,
.control:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  outline: 3px solid rgba(67, 94, 229, 0.2);
  outline-offset: 1px;
}

.btn-primary {
  background: var(--base-color-sand-300);
  color: var(--base-color-plum-900);
}

.btn-primary:hover {
  background: #dbdbd4;
}

.btn-accent {
  background: var(--base-color-red-500);
  color: var(--base-color-white);
}

.btn-accent:hover {
  background: var(--base-color-red-600);
}

.btn-gold {
  background: var(--base-color-red-500);
  color: var(--base-color-white);
}

.btn-gold:hover {
  background: var(--base-color-red-600);
}

.btn-ghost,
.btn-outline {
  background: transparent;
  color: var(--base-color-plum-900);
}

.btn-ghost:hover,
.btn-outline:hover {
  background: var(--base-color-sand-300);
}

.btn-link {
  padding: 0;
  min-height: auto;
  border-radius: 0;
}

.field {
  width: 100%;
}

.field-label,
.form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--base-color-olive-700);
  font-size: 12px;
  font-weight: 600;
}

.control,
.textarea,
.select,
.form-input {
  width: 100%;
  border: 1px solid var(--base-color-olive-500);
  border-radius: var(--radius-md);
  background: var(--base-color-white);
  padding: 11px 15px;
  color: var(--base-color-plum-900);
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.control::placeholder,
.textarea::placeholder,
.form-input::placeholder {
  color: var(--base-color-olive-500);
}

.control:focus,
.textarea:focus,
.select:focus,
.form-input:focus {
  border-color: var(--base-color-focus);
  box-shadow: 0 0 0 3px rgba(67, 94, 229, 0.12);
}

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

.tag,
.badge,
.score-chip,
.status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: var(--radius-md);
  background: var(--warm-wash);
  color: var(--base-color-olive-700);
  font-size: 12px;
  font-weight: 500;
}

.score-chip,
.badge.important {
  background: rgba(230, 0, 35, 0.08);
  color: var(--base-color-red-500);
}

.status-chip.pending,
.badge.normal {
  background: var(--base-color-sand-300);
  color: var(--base-color-olive-700);
}

.badge.urgent {
  background: rgba(158, 10, 10, 0.1);
  color: #9e0a0a;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(200, 200, 193, 0.65);
}

.topbar-inner {
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
}

.topbar-nav,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.topbar-nav {
  justify-content: center;
}

.topbar-actions {
  justify-content: flex-end;
}

.nav-pill {
  min-height: 36px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--base-color-plum-900);
}

.nav-pill:hover,
.nav-pill.active {
  background: var(--base-color-sand-300);
}

.hero {
  padding: 44px 0 28px;
}

.section {
  padding: 0 0 32px;
}

.section-title {
  margin: 0 0 16px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1.2px;
}

.section-subtitle,
.legend,
.muted {
  color: var(--base-color-olive-700);
}

.legend {
  font-size: 12px;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.work-card,
.panel-card,
.surface-card,
.auth-card,
.dashboard-card,
.detail-card,
.profile-card,
.metric-card,
.announcement-card {
  background: var(--base-color-white);
  border: 1px solid rgba(200, 200, 193, 0.8);
  border-radius: var(--radius-lg);
}

.panel-card,
.surface-card,
.detail-card,
.dashboard-card,
.profile-card,
.metric-card,
.announcement-card {
  padding: 24px;
}

.work-thumb,
.detail-cover {
  position: relative;
  overflow: hidden;
  background: var(--base-color-sand-200);
  border-radius: var(--radius-lg);
}

.work-thumb {
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--base-color-white);
  font-size: 60px;
}

.work-thumb img,
.detail-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(33, 25, 34, 0.02), rgba(33, 25, 34, 0.28));
}

.work-review-badge {
  position: absolute;
  top: 16px;
  right: 16px;
}

.work-card-body {
  padding: 16px 18px 0;
}

.work-card-title,
.detail-title {
  margin: 0;
  color: var(--base-color-plum-900);
}

.work-card-title {
  font-size: 16px;
  font-weight: 600;
}

.work-card-meta,
.detail-info,
.comment-head,
.inline-meta,
.split,
.form-actions,
.tag-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.work-card-meta,
.detail-info {
  margin-top: 8px;
  color: var(--base-color-olive-700);
  font-size: 14px;
}

.work-card-footer {
  padding: 0 18px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--base-color-white);
}

.detail-layout,
.dashboard-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.9fr);
  gap: 24px;
}

.detail-cover {
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--base-color-white);
  font-size: 84px;
}

.detail-title {
  margin: 18px 0 10px;
  font-size: clamp(36px, 5vw, 54px);
  font-weight: 600;
  letter-spacing: -1.2px;
  line-height: 1.04;
}

.detail-description {
  margin-top: 18px;
  color: var(--base-color-plum-900);
  line-height: 1.8;
}

.review-box,
.comment-box,
.empty-state,
.announcement-item,
.student-row,
.review-row,
.notification-item {
  background: var(--base-color-sand-200);
  border: 1px solid rgba(200, 200, 193, 0.7);
  border-radius: var(--radius-lg);
}

.review-box,
.comment-box,
.notification-item,
.announcement-item,
.student-row,
.review-row {
  padding: 16px;
}

.comment-list,
.stack,
.review-table,
.student-table,
.chart-list {
  display: grid;
  gap: 14px;
}

.grid-2,
.grid-3,
.grid-4,
.form-grid {
  display: grid;
  gap: 16px;
}

.grid-2,
.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
  background:
    radial-gradient(circle at top left, rgba(229, 229, 224, 0.8), transparent 28%),
    radial-gradient(circle at bottom right, rgba(230, 0, 35, 0.06), transparent 24%),
    var(--base-color-white);
}

.auth-card {
  width: min(580px, 100%);
  padding: 32px;
  border-radius: 32px;
}

.auth-card h1 {
  margin: 18px 0 10px;
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 600;
  line-height: 1.05;
}

.auth-card p {
  margin: 0 0 22px;
  color: var(--base-color-olive-700);
}

.small {
  font-size: 12px;
}

.empty-state {
  padding: 18px;
  color: var(--base-color-olive-700);
  font-size: 14px;
}

.preview-image {
  margin-top: 12px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 8px solid var(--base-color-white);
  background: var(--base-color-white);
}

.inline-form {
  display: inline;
}

.chart-row {
  display: grid;
  grid-template-columns: 90px 1fr 42px;
  gap: 10px;
  align-items: center;
}

.bar-track {
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--base-color-sand-300);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--base-color-red-500);
}

.text-right {
  text-align: right;
}

@media (max-width: 1080px) {
  .detail-layout,
  .dashboard-layout,
  .grid-4,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .topbar-inner {
    grid-template-columns: 1fr;
    justify-items: stretch;
    padding: 12px 0;
  }

  .topbar-nav,
  .topbar-actions,
  .split,
  .form-actions {
    justify-content: flex-start;
  }

  .grid-2,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .detail-cover {
    min-height: 280px;
    font-size: 56px;
  }
}