* {
  box-sizing: border-box;
}

:root {
  --primary: #0f766e;
  --secondary: #2563eb;
  --accent: #f59e0b;
  --ink: #18212f;
  --muted: #667085;
  --line: #d8dee8;
  --surface: #ffffff;
  --soft: #f4f7fb;
  font-family: Inter, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: #eef3f8;
}

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

button {
  cursor: pointer;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px;
}

.topbar,
.workspace-header,
.module-heading,
.dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar h1,
.workspace-header h1,
.brand-block h2,
.panel-heading h2,
.intro-panel h2 {
  margin: 0;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.ghost-link,
button,
.primary-button,
.secondary-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

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

.secondary-button {
  width: 100%;
}

.landing {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.6fr);
  gap: 24px;
  align-items: stretch;
  margin-top: 32px;
}

.intro-panel,
.login-panel,
.module-panel,
.flow-card,
.stat-card,
dialog {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 16px 40px rgba(16, 24, 40, 0.08);
}

.intro-panel,
.login-panel {
  padding: 28px;
}

.intro-panel p {
  max-width: 760px;
  color: var(--muted);
  line-height: 1.8;
}

.visual-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  min-height: 150px;
  margin-bottom: 24px;
}

.visual-board span {
  border-radius: 8px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.75), rgba(255,255,255,0.1)),
    var(--primary);
}

.visual-board span:nth-child(2) {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.75), rgba(255,255,255,0.1)),
    var(--secondary);
  transform: translateY(18px);
}

.visual-board span:nth-child(3) {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.75), rgba(255,255,255,0.1)),
    var(--accent);
}

.visual-board span:nth-child(4) {
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.32) 0 8px, transparent 8px 16px),
    var(--secondary);
  transform: translateY(28px);
}

.module-pills,
.quick-logins,
.toolbar,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.module-pills span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  background: var(--soft);
  color: #344054;
  font-weight: 700;
}

form label {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
  color: #344054;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

.form-message {
  min-height: 22px;
  color: #b42318;
}

.app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  border-right: 1px solid var(--line);
  background: #fff;
}

.brand-block {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
}

.brand-block span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
}

nav {
  display: grid;
  gap: 8px;
  overflow: auto;
}

nav button {
  display: grid;
  gap: 4px;
  text-align: left;
}

nav button.active {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 9%, white);
  color: var(--primary);
}

nav small {
  color: var(--muted);
}

.workspace {
  min-width: 0;
  padding: 24px;
}

.workspace-header {
  margin-bottom: 22px;
}

.toolbar input {
  width: 220px;
}

.dashboard {
  display: grid;
  gap: 18px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px;
}

.stat-card strong {
  display: block;
  font-size: 32px;
  color: var(--primary);
}

.stat-card span {
  color: var(--muted);
  font-weight: 700;
}

.flow-card,
.module-panel {
  padding: 20px;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.flow-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}

.flow-item strong,
.flow-item span {
  display: block;
}

.flow-item span {
  margin-top: 6px;
  color: var(--muted);
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
  font-size: 13px;
}

td {
  color: #344054;
}

dialog {
  width: min(760px, calc(100vw - 28px));
  border: 1px solid var(--line);
  padding: 0;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.42);
}

dialog form {
  padding: 20px;
}

.dialog-head {
  margin-bottom: 16px;
}

.dialog-head button {
  width: 38px;
  height: 38px;
  padding: 0;
}

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

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

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

@media (max-width: 860px) {
  .shell {
    padding: 18px;
  }

  .landing,
  .app,
  .stats,
  .flow-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .workspace {
    padding: 18px;
  }

  .workspace-header,
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .toolbar input {
    width: 100%;
  }

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