:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-soft: #fbfaf7;
  --text: #111111;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

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

body {
  padding: 28px;
}

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

.app {
  max-width: 1440px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  margin-bottom: 28px;
}

.eyebrow,
.section-label {
  color: var(--muted);
  font-size: 0.83rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 2.2rem;
  line-height: 1.05;
  margin-top: 6px;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.2;
  margin-top: 6px;
}

h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.subhead {
  max-width: 640px;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.55;
}

.auth-panel {
  display: none;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  border-radius: 10px;
  font-weight: 600;
}

.button-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line);
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
}

.landing-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}

.hero-grid,
.landing-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.feature-list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.cta-panel {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.login-form {
  min-width: min(360px, 100%);
}

.rail,
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.rail {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-self: start;
  position: sticky;
  top: 24px;
}

.rail-section + .rail-section {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.plain-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}

.main {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  margin-top: 8px;
}

.stat-label {
  color: var(--muted);
  font-size: 0.9rem;
}

.panel {
  padding: 18px;
}

.panel-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

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

.session {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}

.session-title {
  font-weight: 600;
  margin-bottom: 6px;
}

.session-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.88rem;
}

.two-column,
.migration-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.list-table {
  display: flex;
  flex-direction: column;
}

.edu-form {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.edu-form label {
  display: grid;
  gap: 6px;
}

.edu-form span {
  color: var(--muted);
  font-size: 0.92rem;
}

.edu-form input,
.edu-form textarea,
.edu-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  padding: 10px 12px;
}

.row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

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

.row-meta {
  color: var(--muted);
  font-size: 0.93rem;
}

.migration-panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.65;
}

.replay-panel {
  display: grid;
  gap: 14px;
}

.replay-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.replay-box {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
  padding: 14px;
}

.history-list {
  display: grid;
  gap: 8px;
}

.history-item {
  border-top: 1px solid var(--line);
  padding-top: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.history-item:first-child {
  border-top: 0;
  padding-top: 0;
}

@media (max-width: 1100px) {
  .layout,
  .hero-grid,
  .landing-columns,
  .two-column,
  .migration-grid,
  .strip,
  .session-grid {
    grid-template-columns: 1fr;
  }

  .rail {
    position: static;
  }

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

  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .replay-summary {
    grid-template-columns: 1fr 1fr;
  }
}