/*
 * A.2 — self-hosted, no external font or CDN reference anywhere in this file.
 * A.3 — Site A shares nothing with Site B: no shared stylesheet, bundle,
 *       favicon or analytics id. B gets its own.
 *
 * Lives in public/ rather than being imported, deliberately: Astro inlines
 * small stylesheets into the document by default, and an inlined stylesheet
 * would mean the Gate never serves a separate asset request — which is the
 * path TASK-005 needs to prove assets load through the proxy.
 *
 * Design tokens for ATB Business: deep ink + electric teal on paper.
 * Spacing follows an 8px scale (0.5rem steps).
 */

:root {
  --ink: #0e1526;
  --ink-soft: #2a3450;
  --muted: #5b6472;
  --paper: #f7f8fa;
  --surface: #ffffff;
  --rule: #e4e7ec;
  --accent: #0fb5a8;
  --accent-deep: #0a8a80;
  --accent-contrast: #ffffff;
  --accent-soft: #e0f5f3;
  --radius: 0.75rem;
  --maxw: 72rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}

/* ---------- header ---------- */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}

.site-header .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand img {
  display: block;
  width: 1.75rem;
  height: 1.75rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--ink);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}

.btn:hover {
  background: var(--accent-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
}

.btn--ghost:hover {
  background: var(--surface);
  border-color: var(--muted);
}

.btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.875rem;
}

/* ---------- main ---------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 2.25rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h2 {
  margin: 2.5rem 0 0.75rem;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

p {
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 40rem;
}

a {
  color: var(--accent-deep);
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink);
  color: #aab2c5;
}

.site-footer .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
}

.site-footer .brand {
  color: #ffffff;
}

.site-footer nav {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.site-footer nav div {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.site-footer nav strong {
  color: #ffffff;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.site-footer a {
  color: #aab2c5;
  text-decoration: none;
  font-size: 0.9rem;
}

.site-footer a:hover {
  color: #ffffff;
}

.site-footer .legal {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
  font-size: 0.8rem;
  color: #6b7489;
}

@media (max-width: 40rem) {
  .site-nav a:not(.btn) {
    display: none;
  }
}

/* ---------- homepage: hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 2.5rem 0 3.5rem;
}

.hero h1 {
  font-size: 2.75rem;
  line-height: 1.15;
}

.hero .actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

/* hero mockup: two overlapping product cards, pure CSS */
.mockup {
  position: relative;
  min-height: 28rem;
}

.mock-card {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(14, 21, 38, 0.10);
  padding: 1.25rem;
  font-size: 0.875rem;
}

.mock-card--review {
  top: 0;
  left: 0;
  right: 2rem;
}

.mock-card--call {
  bottom: 0;
  left: 2.5rem;
  right: 0;
}

.mock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.mock-title {
  font-weight: 600;
  color: var(--ink);
}

.mock-tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  white-space: nowrap;
}

.mock-stars {
  color: #e8a33d;
  letter-spacing: 0.1em;
  margin-bottom: 0.375rem;
}

.mock-body {
  color: var(--muted);
  margin: 0 0 0.75rem;
}

.mock-draft {
  border-left: 3px solid var(--accent);
  background: var(--paper);
  border-radius: 0 0.5rem 0.5rem 0;
  padding: 0.625rem 0.875rem;
  color: var(--ink-soft);
  margin-bottom: 0.875rem;
}

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

.mock-transcript {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.mock-transcript .who {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

.mock-transcript p {
  margin: 0;
  color: var(--muted);
}

.mock-resolved {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-deep);
}

/* ---------- homepage: sections ---------- */

.section {
  padding: 3rem 0;
  border-top: 1px solid var(--rule);
}

.section > h2 {
  margin-top: 0;
}

.section-intro {
  color: var(--muted);
  max-width: 40rem;
  margin-bottom: 2rem;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
}

.product-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(14, 21, 38, 0.08);
}

.product-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: var(--ink);
}

.product-card .stat {
  display: inline-block;
  font-weight: 700;
  color: var(--accent-deep);
  margin-bottom: 0.5rem;
}

.product-card p {
  color: var(--muted);
  flex: 1;
}

.product-card .more {
  font-weight: 600;
  color: var(--accent-deep);
}

/* steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.steps li {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.5rem;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.steps h3 {
  margin: 0 0 0.375rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.925rem;
}

/* control callout */
.callout {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.callout h3 {
  margin: 0 0 0.375rem;
  color: var(--ink);
}

.callout p {
  margin: 0;
  color: var(--ink-soft);
}

/* CTA band */
.cta-band {
  background: var(--ink);
  color: #e8eaed;
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 0.75rem;
  color: #ffffff;
  font-size: 1.75rem;
}

.cta-band p {
  color: #aab2c5;
  max-width: 34rem;
  margin: 0 auto 1.5rem;
}

@media (max-width: 56rem) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .card-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  /* mock cards stack statically — absolute overlap breaks on narrow screens */
  .mockup {
    min-height: 0;
    display: grid;
    gap: 1rem;
  }

  .mock-card {
    position: static;
  }
}

/* ---------- product pages ---------- */

.product-hero {
  max-width: 46rem;
  padding: 1.5rem 0 0;
}

.product-hero h1 {
  font-size: 2.5rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--ink);
}

.screenshot {
  margin: 2.5rem 0 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(14, 21, 38, 0.12);
  background: var(--surface);
}

.screenshot img {
  display: block;
  width: 100%;
  height: auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.feature h3 {
  margin: 0 0 0.375rem;
  font-size: 1.05rem;
  color: var(--ink);
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.925rem;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

.faq summary::before {
  content: "+";
  display: inline-block;
  width: 1.25rem;
  color: var(--accent-deep);
  font-weight: 700;
}

.faq details[open] summary::before {
  content: "−";
}

.faq details p {
  margin: 0.75rem 0 0.25rem;
  color: var(--muted);
}

@media (max-width: 56rem) {
  .product-hero h1 {
    font-size: 1.9rem;
  }

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

/* shared CTA row (hero + product pages) */
.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ---------- pricing ---------- */

.pricing-product {
  padding: 2.5rem 0;
  border-top: 1px solid var(--rule);
}

.pricing-product:first-of-type {
  border-top: 0;
  padding-top: 1rem;
}

.pricing-product h2 {
  margin-top: 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: stretch;
}

.tier {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.tier--featured {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(14, 21, 38, 0.08);
}

.tier-badge {
  position: absolute;
  top: -0.7rem;
  left: 1.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-contrast);
  background: var(--accent);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
}

.tier h3 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  color: var(--ink);
}

.tier-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 0.25rem;
}

.tier-price .per {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
}

.tier-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.tier ul {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  flex: 1;
}

.tier li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.925rem;
  color: var(--ink-soft);
}

.tier li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-deep);
  font-weight: 700;
}

.pricing-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin: 2rem 0 0;
}

/* ---------- contact form ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.form {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 2rem;
}

.form label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
  margin-bottom: 0.375rem;
}

.form .field {
  margin-bottom: 1.25rem;
}

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--rule);
  border-radius: 0.5rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.form textarea {
  min-height: 7rem;
  resize: vertical;
}

.form .btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.form .btn[disabled] {
  opacity: 0.7;
  cursor: wait;
}

.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--accent-contrast);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-success {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
}

.form-success .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

/* ---------- legal/prose pages ---------- */

.prose {
  max-width: 42rem;
}

.prose h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
}

.prose p,
.prose li {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.prose ul {
  padding-left: 1.25rem;
}

@media (max-width: 56rem) {
  .pricing-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.form .optional {
  font-weight: 400;
  color: var(--muted);
}

.form-success h2 {
  margin-top: 0;
}

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

/* ---------- sign-in page ---------- */

.signin {
  max-width: 28rem;
  margin: 0 auto;
}

.tabs {
  display: flex;
  margin-bottom: 1.25rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.tabs button {
  flex: 1;
  padding: 0.625rem 1rem;
  border: 0;
  background: var(--paper);
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.tabs button + button {
  border-left: 1px solid var(--rule);
}

.tabs button[aria-selected="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
}

.form-error {
  display: none;
  margin: 0 0 1.25rem;
  padding: 0.625rem 0.875rem;
  border-radius: 0.5rem;
  background: #fdecec;
  color: #b3261e;
  font-size: 0.9rem;
  font-weight: 600;
}

/* ---------- mobile nav (pure <details>, no JS) ---------- */

.nav-mobile {
  display: none;
}

@media (max-width: 40rem) {
  .nav-mobile {
    display: block;
    position: relative;
  }

  .nav-mobile summary {
    list-style: none;
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    padding: 0.3rem 0.5rem;
    color: var(--ink);
    user-select: none;
  }

  .nav-mobile summary::-webkit-details-marker {
    display: none;
  }

  .nav-mobile[open] summary {
    color: var(--accent-deep);
  }

  .nav-mobile-links {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    z-index: 10;
    display: flex;
    flex-direction: column;
    min-width: 13rem;
    padding: 0.5rem;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    box-shadow: 0 12px 32px rgba(14, 21, 38, 0.12);
  }

  .nav-mobile-links a {
    padding: 0.625rem 0.875rem;
    color: var(--ink);
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 0.5rem;
  }

  .nav-mobile-links a:hover {
    background: var(--paper);
  }

  .nav-mobile-links a:last-child {
    color: var(--accent-deep);
    font-weight: 600;
  }
}