:root {
  color-scheme: light dark;
  --brand-color: #161c36;
  --accent: #1d4ed8;
  --btn-primary-bg: #1d4ed8;
  --btn-primary-bg-hover: #1e40af;
  --btn-primary-fg: #ffffff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #cbd5e1;
  --danger-border: #dc2626;
  --fb-info-bg: #eff6ff;
  --fb-info-fg: #1e3a8a;
  --fb-info-border: #93c5fd;
  --fb-warn-bg: #fffbeb;
  --fb-warn-fg: #78350f;
  --fb-warn-border: #fcd34d;
  --fb-err-bg: #fef2f2;
  --fb-err-fg: #991b1b;
  --fb-err-border: #fca5a5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-color: #60a5fa;
    --accent: #60a5fa;
    --btn-primary-bg: #1d4ed8;
    --btn-primary-bg-hover: #2563eb;
    --btn-primary-fg: #ffffff;
    --bg: #0b1120;
    --surface: #1e293b;
    --surface-alt: #0f172a;
    --text: #f8fafc;
    --muted: #cbd5e1;
    --border: #334155;
    --danger-border: #f87171;
    --fb-info-bg: #172554;
    --fb-info-fg: #dbeafe;
    --fb-info-border: #3b82f6;
    --fb-warn-bg: #451a03;
    --fb-warn-fg: #fef3c7;
    --fb-warn-border: #f59e0b;
    --fb-err-bg: #450a0a;
    --fb-err-fg: #fecaca;
    --fb-err-border: #ef4444;
  }
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  accent-color: var(--brand-color);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 18px;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 0 7px;
  height: 34px;
  border-radius: 8px;
  background: #161c36;
  color: #ffffff;
  font-size: 12px;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.logo-dot {
  color: var(--accent);
}

.main-nav {
  display: flex;
  gap: 22px;
}

.main-nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

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

.cta-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.cta-btn {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
}

.cta-btn:hover:not(:disabled) {
  background: var(--btn-primary-bg-hover);
}

.cta-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.cta-small {
  padding: 9px 15px;
  font-size: 13.5px;
}

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

.full-width {
  width: 100%;
}

/* Hero */
.hero {
  padding: 68px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 44px;
  align-items: center;
}

@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .main-nav {
    display: none;
  }
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 10px;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.lead {
  font-size: 17px;
  color: var(--muted);
  margin: 0 0 26px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.trust-line {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

/* Mock Sidepanel */
.mock-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 18px 40px rgb(15 23 42 / 0.08);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.mock-badge {
  background: #dbeafe;
  color: #1e40af;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
}

.mock-alert {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  border-left: 4px solid;
}

.mock-alert strong {
  display: block;
  margin-bottom: 3px;
}

.mock-alert.critical {
  background: #fef2f2;
  border-color: #ef4444;
  color: #7f1d1d;
}

.mock-alert.warn {
  background: #fffbeb;
  border-color: #f59e0b;
  color: #78350f;
}

.mock-alert.ok {
  background: #dceefb;
  border-color: #1d4ed8;
  color: #0f172a;
}

/* Sections */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--surface-alt);
}

.section h2 {
  font-size: 28px;
  margin: 0 0 28px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
}

/* Pricing */
.pricing-wrap {
  display: flex;
  justify-content: center;
}

.pricing-card {
  max-width: 520px;
  width: 100%;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 16px;
  padding: 32px;
}

.pricing-card h2 {
  text-align: left;
  margin-bottom: 8px;
}

.price-line {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 20px;
}

.price-amount {
  font-size: 38px;
  font-weight: 800;
}

.price-unit {
  color: var(--muted);
  font-weight: 600;
}

.check-list {
  padding-left: 20px;
  margin: 0 0 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Footer & Legal */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  background: var(--surface);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.small-muted {
  color: var(--muted);
  font-size: 13px;
}

.legal-doc {
  padding: 48px 20px 72px;
  max-width: 800px;
}

.legal-doc h1 {
  margin-bottom: 6px;
}

.legal-doc h2 {
  margin-top: 28px;
  font-size: 20px;
}

/* Native Modal Dialog */
dialog[open] {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px;
  max-width: 440px;
  width: calc(100% - 32px);
  background: var(--surface);
  color: var(--text);
}

dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  background: rgb(15 23 42 / 0.55);
  overflow: hidden;
  overscroll-behavior: contain;
}

.modal-sub {
  margin: 4px 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 13.5px;
  font-weight: 600;
}

.modal-form input[type="text"],
.modal-form input[type="email"] {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.modal-form input:user-invalid {
  border-color: var(--danger-border);
  outline: 2px solid rgb(220 38 38 / 0.2);
}

.terms-check {
  flex-direction: row !important;
  align-items: flex-start;
  gap: 10px !important;
  font-weight: 400 !important;
}

@supports not (accent-color: var(--brand-color)) {
  input[type="checkbox"].visually-hidden {
    position: absolute !important;
    clip-path: inset(50%) !important;
    overflow: hidden !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    border: 0 !important;
    white-space: nowrap !important;
  }

  .terms-check {
    position: relative;
    padding-left: 1.75rem;
  }

  .terms-check input[type="checkbox"] + span::before {
    content: "";
    position: absolute;
    left: 0;
    top: 3px;
    width: 1.1rem;
    height: 1.1rem;
    border: 2px solid #94a3b8;
    border-radius: 4px;
  }

  .terms-check input[type="checkbox"]:checked + span::before {
    background-color: var(--brand-color);
    border-color: var(--brand-color);
  }
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

.modal-feedback {
  margin: 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--fb-info-bg);
  color: var(--fb-info-fg);
  border: 1px solid var(--fb-info-border);
  font-size: 13px;
}

.modal-feedback[data-state="warn"] {
  background: var(--fb-warn-bg);
  color: var(--fb-warn-fg);
  border-color: var(--fb-warn-border);
}

.modal-feedback[data-state="error"] {
  background: var(--fb-err-bg);
  color: var(--fb-err-fg);
  border-color: var(--fb-err-border);
}