:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-soft: #f9fafc;
  --text: #172033;
  --muted: #637083;
  --border: #dce2ea;
  --accent: #1677ff;
  --accent-strong: #0f5fcc;
  --success: #1f8f5f;
  --warning: #b26a00;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(20, 38, 70, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(340px, 0.95fr);
  background: linear-gradient(120deg, #eef4ff 0%, #f7fbf8 48%, #fff8ee 100%);
}

.login-intro {
  padding: clamp(32px, 7vw, 96px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.login-intro h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.login-intro p {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.login-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
  max-width: 720px;
}

.login-point,
.stat,
.panel,
.task-card,
.file-row,
.record {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.login-point {
  padding: 14px 16px;
  color: #2d3a4e;
}

.login-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.login-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.login-card h2,
.panel h2,
.panel h3 {
  margin: 0;
}

.login-card p {
  color: var(--muted);
  line-height: 1.7;
}

.field {
  display: grid;
  gap: 7px;
  margin: 14px 0;
}

.field label {
  color: #364256;
  font-size: 14px;
  font-weight: 600;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 10px 12px;
  min-height: 42px;
}

.field textarea {
  min-height: 92px;
  resize: vertical;
  line-height: 1.7;
}

.primary,
.ghost,
.danger {
  min-height: 40px;
  border-radius: 8px;
  padding: 0 14px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
}

.primary {
  background: var(--accent);
  color: #fff;
}

.primary:hover {
  background: var(--accent-strong);
}

.ghost {
  background: #fff;
  color: #26364c;
  border-color: var(--border);
}

.danger {
  background: #fff;
  color: var(--danger);
  border-color: #f0c9c4;
}

.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar {
  background: #101828;
  color: #e6ecf5;
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  padding: 8px 8px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.brand strong {
  display: block;
  font-size: 20px;
}

.brand span {
  color: #9aa7ba;
  font-size: 13px;
}

.nav {
  display: grid;
  gap: 7px;
}

.nav button {
  width: 100%;
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #d8e0ea;
  text-align: left;
  padding: 0 12px;
  cursor: pointer;
}

.nav button.active,
.nav button:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.sidebar-footer {
  margin-top: auto;
  color: #9aa7ba;
  font-size: 13px;
  line-height: 1.7;
}

.content {
  min-width: 0;
  padding: 26px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
}

.topbar p,
.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.58fr);
  align-items: start;
}

.task-layout {
  display: grid;
  grid-template-columns: minmax(260px, 360px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.resource-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.72fr) minmax(420px, 1fr);
  gap: 16px;
  align-items: start;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  padding: 16px;
}

.stat span {
  color: var(--muted);
  font-size: 13px;
}

.stat strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

.panel {
  padding: 18px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.03);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.panel-head p {
  margin: 4px 0 0;
}

.task-card {
  padding: 16px;
  display: grid;
  gap: 9px;
  cursor: pointer;
}

.task-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.12);
}

.task-card h3 {
  margin: 0;
  font-size: 17px;
}

.task-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.markdown {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  line-height: 1.8;
  overflow-x: auto;
}

.markdown.compact {
  border: 0;
  padding: 0;
}

.task-reader {
  max-height: calc(100vh - 150px);
  overflow: auto;
}

.markdown h1 {
  margin-top: 0;
  font-size: 26px;
}

.markdown h2 {
  margin-top: 28px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
}

.markdown h3 {
  margin-top: 22px;
}

.markdown h4 {
  margin: 18px 0 8px;
}

.markdown p {
  margin: 10px 0;
}

.markdown code {
  background: #eef2f7;
  border-radius: 5px;
  padding: 1px 5px;
}

.markdown table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14px;
}

.table-wrap {
  width: 100%;
  overflow: auto;
}

.markdown th,
.markdown td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  vertical-align: top;
}

.markdown th {
  background: var(--panel-soft);
}

.markdown blockquote {
  margin: 12px 0;
  border-left: 4px solid var(--accent);
  background: #f4f8ff;
  padding: 8px 14px;
}

.file-list,
.records {
  display: grid;
  gap: 10px;
}

.file-row {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.file-main {
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0;
  text-align: left;
  cursor: pointer;
  display: grid;
  gap: 4px;
  min-width: 0;
}

.file-main:hover strong {
  color: var(--accent);
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.file-row small,
.record small {
  color: var(--muted);
}

.record {
  padding: 14px;
}

.record h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.record dl {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 7px 12px;
  margin: 8px 0 0;
  font-size: 14px;
}

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

.record dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 14px;
}

.form-grid .wide {
  grid-column: 1 / -1;
}

.form-section {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 10px;
}

.form-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.form-section h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.notice {
  border: 1px solid #fedf89;
  background: #fffaeb;
  color: #7a4b00;
  border-radius: 8px;
  padding: 12px 14px;
  line-height: 1.7;
}

.success-text {
  color: var(--success);
}

.error-text {
  color: var(--danger);
}

.preview-panel {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 52px);
  overflow: auto;
}

.empty-preview {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.code-preview {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0f172a;
  color: #e5eefc;
  white-space: pre-wrap;
  overflow: auto;
  line-height: 1.7;
}

.embed-preview {
  width: 100%;
  height: 68vh;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.image-preview {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(15, 23, 42, 0.56);
  padding: 28px;
}

.modal {
  background: var(--panel);
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin: 0 auto;
}

.modal.large {
  width: min(1180px, 100%);
  height: calc(100vh - 56px);
  display: flex;
  flex-direction: column;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}

.modal-head h2 {
  margin: 0;
  font-size: 20px;
}

.modal-head p {
  margin: 4px 0 0;
  color: var(--muted);
}

.modal-markdown {
  border: 0;
  border-radius: 0;
  flex: 1;
  overflow: auto;
  padding: 24px 34px;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  background: #eef7f1;
  color: var(--success);
  padding: 0 10px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

@media (max-width: 920px) {
  .login-shell,
  .app-shell,
  .grid.two,
  .task-layout,
  .resource-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
  }

  .stats,
  .login-points,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .content {
    padding: 18px;
  }

  .preview-panel,
  .task-reader {
    position: static;
    max-height: none;
  }

  .modal-backdrop {
    padding: 10px;
  }

  .modal.large {
    height: calc(100vh - 20px);
  }
}