/* keikaku.ai marketing — brand tokens mirror apps/web/src/styles.css (docs/09-brand.md) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/inter-700.woff2') format('woff2');
}

:root {
  --bg: #0d0b09;
  --surface: #1a1612;
  --border: #2a241e;
  --text: #ffffff;
  --muted: #8a847e;
  --metal: #6a6663;
  --accent: #ff8a00;
  --accent-hover: #ff9d2e;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    'Inter',
    ui-sans-serif,
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  color: var(--accent-hover);
}

/* --- wordmark --- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand .tld {
  color: var(--accent);
}
.brand.small {
  font-size: 0.95rem;
}

/* --- buttons --- */
.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 0.7rem 1.15rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg); /* dark label on bright orange — high contrast */
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
}
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--metal);
  color: var(--text);
}

/* --- nav --- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
}
.nav-links a:hover {
  color: var(--text);
}
.nav-links .btn-ghost {
  color: var(--text);
}

/* --- hero --- */
.hero {
  max-width: 820px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
  text-align: center;
}
.hero-logo {
  width: 140px;
  height: auto;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 8px 28px rgba(255, 138, 0, 0.18));
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1.2rem;
}
.hero .accent {
  color: var(--accent);
}
.lede {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: #d8d2cb;
  max-width: 640px;
  margin: 0 auto 2rem;
}
.cta-row {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-row.center {
  margin-top: 2rem;
}
.sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 1.5rem;
}

/* --- sections --- */
.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}
.section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  letter-spacing: -0.02em;
  text-align: center;
  margin: 0 0 2.5rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
}
.feature h3 {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
}
.feature h3::before {
  content: '';
  display: block;
  width: 28px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 0.9rem;
}
.feature p {
  margin: 0;
  color: #cfc9c2;
  font-size: 0.95rem;
}

/* --- edge --- */
.edge {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.edge-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  max-width: 880px;
  margin: 0 auto;
}
.edge-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.6rem;
}
.edge-col.accent-col {
  border-color: rgba(255, 138, 0, 0.4);
  box-shadow: 0 0 0 1px rgba(255, 138, 0, 0.15);
}
.edge-col p {
  margin: 0.6rem 0 0;
  color: #cfc9c2;
}
.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.accent-col .tag {
  color: var(--accent);
}

/* --- footer --- */
.footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--border);
}
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.4rem;
}
.footer-links a {
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-links a:hover {
  color: var(--text);
}
.footer-base {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

/* --- simple content pages (about, privacy, terms) --- */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 1rem;
}
.prose .page-title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}
.prose .updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 2rem;
}
.prose h2 {
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  margin: 2.2rem 0 0.6rem;
}
.prose h2:first-of-type {
  margin-top: 1rem;
}
.prose p,
.prose li {
  color: #d8d2cb;
  line-height: 1.7;
}
.prose ul {
  padding-left: 1.2rem;
}
.prose li {
  margin: 0.3rem 0;
}
.prose a {
  color: var(--accent);
}
.prose .lead {
  font-size: 1.15rem;
  color: #e6e0d9;
}

/* --- docs (help pages) --- */
.prose pre {
  background: #050403;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.55;
}
.prose code {
  font-family: 'SFMono-Regular', ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 0.88em;
}
.prose :not(pre) > code {
  background: #050403;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1rem 0.35rem;
  color: #e6e0d9;
}
.prose pre code {
  color: #d8d2cb;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}
.prose th,
.prose td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border);
}
.prose th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
/* callouts: note + prereq checklist */
.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0;
}
.callout.warn {
  border-left-color: #ff4438;
}
.callout p {
  margin: 0.3rem 0;
}
.callout strong {
  color: var(--text);
}
/* buttons inside .prose: keep their own label colour (.prose a would otherwise
   repaint the label orange — orange-on-orange = invisible on btn-primary) */
.prose a.btn-primary,
.prose a.btn-primary:hover {
  color: var(--bg);
}
.prose a.btn-ghost,
.prose a.btn-ghost:hover {
  color: var(--text);
}

/* --- docs hub: sticky table of contents + content --- */
.doc-layout {
  max-width: 1040px;
  margin: 0 auto;
  padding: 3rem 1.5rem 1rem;
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 2.75rem;
  align-items: start;
}
.doc-layout .prose {
  max-width: 720px;
  margin: 0;
  padding: 0;
}
.doc-toc {
  position: sticky;
  top: 1.75rem;
}
.doc-toc .toc-label {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.doc-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--border);
}
.doc-toc li {
  margin: 0;
}
.doc-toc a {
  display: block;
  margin-left: -1px;
  padding: 0.42rem 0 0.42rem 0.9rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}
.doc-toc a:hover {
  color: var(--text);
}
.doc-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}
/* anchored headings clear the top edge on jump */
.prose h2[id] {
  scroll-margin-top: 1.5rem;
}
@media (max-width: 820px) {
  .doc-layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 2.5rem;
  }
  .doc-toc {
    display: none;
  }
}

/* --- docs: copy button on code blocks --- */
.prose pre {
  position: relative;
}
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.55rem;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition:
    opacity 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}
.prose pre:hover .copy-btn,
.copy-btn:focus-visible {
  opacity: 1;
}
.copy-btn:hover {
  color: var(--text);
  border-color: var(--metal);
}
.copy-btn.copied {
  opacity: 1;
  color: var(--accent);
  border-color: rgba(255, 138, 0, 0.4);
}
@media (hover: none) {
  .copy-btn {
    opacity: 1;
  } /* touch devices have no hover — always show */
}

/* --- docs: screenshot figure --- */
.shot {
  margin: 1.5rem 0;
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.shot figcaption {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* --- docs: customer architecture diagram --- */
.arch {
  display: flex;
  align-items: stretch;
  gap: 0.85rem;
  margin: 1.5rem 0 0.6rem;
}
.arch-logo {
  display: block;
  margin-bottom: 0.4rem;
  filter: drop-shadow(0 2px 6px rgba(255, 138, 0, 0.25));
}
.arch-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}
/* dashed = the trust boundary: everything here is your own hardware */
.arch-local {
  border-style: dashed;
}
.arch-cloud {
  justify-content: center;
  border-color: rgba(255, 138, 0, 0.4);
  box-shadow: 0 0 0 1px rgba(255, 138, 0, 0.12);
}
.arch-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.arch-cloud .arch-tag {
  color: var(--accent);
}
.arch-box {
  background: #050403;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}
.arch-box small {
  display: block;
  margin-top: 0.2rem;
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--muted);
}
.arch-cloud-box {
  border-color: rgba(255, 138, 0, 0.35);
}
.arch-rel {
  font-size: 0.74rem;
  color: var(--metal);
  padding-left: 0.1rem;
}
.arch-agents {
  display: flex;
  gap: 0.45rem;
}
.arch-agents span {
  flex: 1;
  text-align: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 0.45rem 0.3rem;
  font-size: 0.8rem;
  color: #d8d2cb;
}
.arch-note {
  margin: 0.1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}
.arch-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  min-width: 84px;
  font-size: 0.72rem;
  line-height: 1.3;
  text-align: center;
  color: var(--muted);
}
.arch-arrow {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--accent);
}
.arch-caption {
  margin: 0.4rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}
@media (max-width: 620px) {
  .arch {
    flex-direction: column;
    align-items: stretch;
  }
  .arch-link {
    flex-direction: row;
    gap: 0.5rem;
    min-width: 0;
  }
  .arch-arrow {
    transform: rotate(90deg);
  }
}

/* docs hub cards */
.doc-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}
.doc-cards a {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  color: var(--text);
  transition:
    border-color 0.2s ease,
    transform 0.2s ease;
}
.doc-cards a:hover {
  border-color: var(--metal);
  transform: translateY(-2px);
  color: var(--text);
}
.doc-cards strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.3rem;
}
.doc-cards span {
  color: var(--muted);
  font-size: 0.9rem;
}
.step {
  counter-reset: step;
}

@media (max-width: 560px) {
  .nav-links a:not(.btn) {
    display: none;
  }
  .doc-cards {
    grid-template-columns: 1fr;
  }
}