*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0b1220;
  --panel: #121c30;
  --panel-soft: #18253e;
  --muted-panel: #0f172a;
  --text: #e5eefc;
  --muted: #9eb0d0;
  --border: rgba(148, 163, 184, 0.28);
  --accent: #38bdf8;
  --accent-dark: #0284c7;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.45);
}

body.light-theme {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --muted-panel: #eef2ff;
  --text: #0f172a;
  --muted: #4b5563;
  --border: rgba(100, 116, 139, 0.24);
  --shadow: 0 16px 36px rgba(15, 23, 42, 0.08);
}

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

body.site-body {
  min-height: 100vh;
}

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

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

body.light-theme .site-header {
  background: rgba(244, 247, 251, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  font-size: 0.92rem;
  box-shadow: var(--shadow);
}

.logo-text {
  letter-spacing: 0.01em;
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-link {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
  transition: 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: rgba(56, 189, 248, 0.12);
}

.admin-link {
  border: 1px solid var(--border);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--panel);
  color: var(--text);
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
}

.hero {
  padding: 4rem 0 3rem;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 40%),
    radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.15), transparent 36%);
}

.hero-grid,
.two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.hero-copy h1,
.subhero h1,
.section-head h2,
.card h2,
.card h3,
.card h1 {
  margin-top: 0;
}

.hero-copy h1 {
  font-size: clamp(2.2rem, 4vw, 3.25rem);
  line-height: 1.05;
  margin-bottom: 0.75rem;
}

.hero-copy p,
.muted,
.muted-text {
  color: var(--muted);
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.hero-badges span,
.must-change-badge {
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.28);
  color: var(--muted);
  font-size: 0.83rem;
}

.panel,
.card,
.stat-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)), var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  box-shadow: var(--shadow);
}

.panel,
.card {
  padding: 1.35rem;
}

.section {
  padding: 2.4rem 0;
}

.muted-section,
.subhero,
.admin-toolbar {
  background: var(--panel-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.subhero {
  padding: 1.8rem 0 1.2rem;
}

.section-head {
  margin-bottom: 1rem;
}

.section-head.compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cards {
  display: grid;
  gap: 1rem;
}

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

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

.stack,
.stack-lg {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stack-lg {
  gap: 1.2rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  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));
}

.grid-span-2 {
  grid-column: span 2;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.38rem;
  color: var(--muted);
}

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

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--muted-panel);
  color: var(--text);
  padding: 0.75rem 0.88rem;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(56, 189, 248, 0.8);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 0.72rem 1.1rem;
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.14);
  color: #fecaca;
  border: 1px solid rgba(239, 68, 68, 0.28);
}

.btn-small {
  padding: 0.5rem 0.75rem;
  font-size: 0.86rem;
}

.result-box,
.login-note,
.flash {
  border-radius: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  background: var(--panel-soft);
}

.estimate-total {
  margin-top: 0.45rem;
  font-weight: 800;
  color: var(--accent);
}

.flash {
  margin-top: 1rem;
}

.flash-success {
  border-color: rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

.flash-error {
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.feature-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.feature-list li + li {
  margin-top: 0.5rem;
}

.note-box {
  padding: 1.25rem;
  border-radius: 1.2rem;
  border: 1px dashed var(--border);
  background: rgba(56, 189, 248, 0.06);
}

.site-footer {
  padding: 1.2rem 0 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-inner,
.toolbar-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
}

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

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

.table th,
.table td {
  text-align: left;
  padding: 0.9rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.table th {
  background: rgba(56, 189, 248, 0.08);
  color: var(--text);
}

.small-text,
.meta-line {
  color: var(--muted);
  font-size: 0.88rem;
}

.inline-form {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.wide-cell {
  min-width: 260px;
}

.admin-toolbar {
  padding: 0.6rem 0;
}

.admin-site-header {
  position: sticky;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  padding: 1.15rem;
}

.stat-label {
  display: block;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
}

.form-slab {
  margin-bottom: 1.5rem;
}

.admin-edit-card {
  background: var(--panel-soft);
}

.narrow {
  width: min(620px, calc(100% - 2rem));
}

.login-card {
  margin-top: 2rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: rgba(2, 132, 199, 0.12);
  padding: 0.14rem 0.38rem;
  border-radius: 0.45rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .two-col,
  .cards.three-up,
  .cards.two-up,
  .stats-grid,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  .grid-span-2 {
    grid-column: auto;
  }
}

@media (max-width: 840px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    position: absolute;
    top: 72px;
    left: 1rem;
    right: 1rem;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 0.75rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .header-inner {
    position: relative;
  }

  .footer-inner,
  .toolbar-inner,
  .inline-form {
    flex-direction: column;
    align-items: stretch;
  }
}