:root {
  --bg: #0f172a;
  --surface: #111827;
  --surface-alt: #1f2937;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --border: #334155;
}

body.light {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #cbd5e1;
}

body.light {
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.08), transparent 25%), #f8fafc;
  color: var(--text);
}

body.light .site-header {
  background: rgba(255, 255, 255, 0.94);
  border-bottom-color: rgba(203, 213, 225, 0.5);
}

body.light .card,
body.light .dashboard-panel,
body.light .status-panel {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(203, 213, 225, 0.7);
}

body.light .page-form input,
body.light .page-form textarea,
body.light .founder-plan-card input,
body.light .founder-plan-card textarea {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  border-color: rgba(203, 213, 225, 0.8);
}

body.light .message {
  color: #2563eb;
}

body.light .button-outline {
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.34);
}

.theme-toggle-button {
  margin-left: 0.5rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.08), transparent 25%), #020617;
  color: var(--text);
}

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

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

.site-header {
  background: rgba(7, 17, 40, 0.92);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: 1.2rem;
}

.site-logo {
  width: 140px;
  height: auto;
  display: block;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.button {
  border: none;
  cursor: pointer;
  font-weight: 600;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  transition: transform 0.2s ease, background 0.2s ease;
}

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

.button-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.24);
}

.button:hover {
  transform: translateY(-1px);
}

.hero {
  position: relative;
  padding: 5rem 0 3rem;
  background: linear-gradient(180deg, rgba(5, 9, 23, 0.96), rgba(10, 10, 14, 0.95)), url('/images/banner.svg') center center / cover no-repeat;
  border-bottom: 1px solid rgba(255, 0, 0, 0.08);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(255, 55, 55, 0.18), transparent 30%), radial-gradient(circle at bottom right, rgba(255, 15, 15, 0.12), transparent 25%);
  pointer-events: none;
}

.hero .hero-content {
  position: relative;
  z-index: 1;
}

.hero-content {
  display: grid;
  gap: 1.5rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4vw, 4rem);
  line-height: 1.05;
}

.hero p {
  max-width: 720px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.section {
  padding: 3rem 0;
}

.plan-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card,
.dashboard-panel,
.status-panel {
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 1rem;
  padding: 1.5rem;
}

.plan-logo {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 1rem;
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 0;
  color: var(--muted);
}

.feature-list li {
  position: relative;
  padding-left: 1.6rem;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.message-box {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 1rem;
  border-radius: 1rem;
  color: #dbeafe;
}

.user-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.user-table th,
.user-table td {
  padding: 0.85rem 0.75rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  text-align: left;
}

.user-table th {
  color: var(--accent);
  font-weight: 700;
}

.user-table input {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.72);
  color: var(--text);
  padding: 0.75rem 0.85rem;
}

.user-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.user-actions .button {
  padding: 0.65rem 1rem;
}

.founder-plan-card {
  display: grid;
  gap: 0.9rem;
}

.founder-plan-card label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
}

.founder-plan-card input,
.founder-plan-card textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.72);
  color: var(--text);
  padding: 0.9rem 1rem;
}

.card h3,
.card p,
.card ul {
  margin: 0;
}

.card ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  color: var(--muted);
}

.card ul li {
  margin-bottom: 0.65rem;
}

.feature-cards {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  display: grid;
  gap: 1rem;
}

.faq-section details {
  margin-bottom: 1rem;
  background: rgba(15, 23, 42, 0.9);
  padding: 1rem;
  border-radius: 0.9rem;
}

.page-form {
  padding: 3rem 0;
}

.page-form form {
  display: grid;
  gap: 1rem;
  max-width: 540px;
}

.page-form label {
  display: grid;
  gap: 0.5rem;
  color: var(--muted);
}

.page-form input,
.page-form textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(15, 23, 42, 0.72);
  color: var(--text);
  padding: 0.95rem 1rem;
}

.page-content {
  padding: 3rem 0;
}

.message {
  margin-top: 1rem;
  color: var(--accent);
}

.site-footer {
  padding: 2rem 0;
  color: var(--muted);
}

@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-start;
  }
}