/* Purpose: TenderFlow SaaS web UI styles. */
/* Last modified: 2026-03-29 */
/* Change summary: premium SaaS visual system with dashboard/admin layout primitives. */
:root {
  color-scheme: light;
  --bg: #0b1220;
  --bg-2: #0f172a;
  --card: #111827;
  --card-2: #0f172a;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --muted-2: #cbd5f5;
  --primary: #3b82f6;
  --primary-2: #2563eb;
  --accent: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --chip: #1e293b;
  --shadow: 0 25px 80px rgba(2, 8, 23, 0.35);
  --radius: 14px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --max: 1200px;
  --font: "Inter", "SF Pro Text", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 800px at 20% -10%, #1e293b 0%, #0b1220 60%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(15, 23, 42, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  font-size: 14px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}

.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.35);
}

.button.secondary {
  background: transparent;
  border-color: #334155;
  color: var(--text);
}

.button.ghost {
  background: transparent;
  color: var(--muted);
}

.button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.hero {
  padding: 80px 0 60px;
  display: grid;
  gap: 48px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: center;
}

.hero h1 {
  font-size: clamp(36px, 4vw, 52px);
  margin: 0 0 16px;
  line-height: 1.1;
}

.hero p {
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 24px;
}

.hero-card {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid #1f2937;
  box-shadow: var(--shadow);
}

.section {
  padding: 60px 0;
}

.section h2 {
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 12px;
}

.section p {
  color: var(--muted);
  margin-top: 0;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 20px 50px rgba(2, 8, 23, 0.25);
}

.card h3 {
  margin: 0 0 8px;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--chip);
  color: var(--muted);
  border: 1px solid #1f2937;
}

.pricing-card {
  position: relative;
}

.pricing-card .price {
  font-size: 32px;
  font-weight: 700;
}

.pricing-card .price small {
  font-size: 14px;
  color: var(--muted);
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.nav-tabs {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.nav-tabs a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  background: #0f172a;
  color: var(--muted);
  border: 1px solid #1f2937;
}

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

.table th,
.table td {
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid var(--border);
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}

.layout {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(200px, 240px) 1fr;
}

.alert {
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #bfdbfe;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric .value {
  font-size: 26px;
  font-weight: 700;
}

.code-block {
  background: #0b1220;
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 12px;
  font-family: "SF Mono", "JetBrains Mono", monospace;
  font-size: 12px;
  color: #e2e8f0;
  overflow-x: auto;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 60px;
  background: #0b1220;
}

.footer-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  color: var(--muted);
  font-size: 13px;
}

.footer h4 {
  margin-top: 0;
  color: var(--text);
}

.form-field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #1f2937;
  background: #0b1220;
  color: var(--text);
}

.auth-card {
  max-width: 420px;
  margin: 40px auto;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
}

.flash {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #1f2937;
  background: #0b1220;
  margin-bottom: 12px;
}

.tag {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #0f172a;
  border: 1px solid #1f2937;
  color: var(--muted);
}

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

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

.table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--text);
  border: 1px solid rgba(59, 130, 246, 0.4);
}

.pill.success {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.45);
}

.pill.warning {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.45);
}

.pill.muted {
  background: rgba(148, 163, 184, 0.12);
  border-color: rgba(148, 163, 184, 0.4);
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.form-inline {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.kpi {
  padding: 18px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.kpi .value {
  font-size: 24px;
  font-weight: 700;
}

.kpi .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
  background: var(--bg);
}

.admin-sidebar {
  padding: 24px;
  border-right: 1px solid var(--border);
  background: #0b1428;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.admin-sidebar a,
.admin-sidebar span {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 0;
  font-size: 14px;
}

.admin-sidebar a.active,
.admin-sidebar a:hover {
  color: var(--text);
}

.admin-content {
  padding: 32px;
}

.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

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

.empty-state {
  padding: 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.notice {
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  background: rgba(59, 130, 246, 0.08);
  border-radius: 10px;
  margin-bottom: 16px;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
}

.split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

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

@media (max-width: 980px) {
  .admin-layout {
    grid-template-columns: 1fr;
  }
  .admin-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }
  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
}