/* Albehide intro — editorial-technical */
:root {
  --navy: #0F1C2E;
  --teal: #00A884;
  --paper: #ffffff;
  --bg: #f5f5f3;
  --ink: #0F1C2E;
  --rule: #e6e4df;
  --muted: #6b6b66;
  --accent: var(--teal);
  --section-pad: 96px;
  --container: 1240px;
}

[data-theme="dark"] {
  --navy: #0F1C2E;
  --paper: #11202F;
  --bg: #0B1622;
  --ink: #F2EFE8;
  --rule: #1f3245;
  --muted: #8aa0b5;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
}

/* Top nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topnav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  max-width: var(--container);
  margin: 0 auto;
}
.topnav .brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topnav .brand .word {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 17px;
}
.topnav .brand svg { width: 26px; height: 26px; }
.topnav nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
  color: var(--muted);
}
.topnav nav a {
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.topnav nav a:hover { color: var(--ink); }
.topnav .ctas {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn.accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Section header */
.section {
  padding: var(--section-pad) 0;
  border-bottom: 1px solid var(--rule);
}
.section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 48px;
}
.section-header .num {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.16em;
}
.section-header .label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
}
.section-header .rule-line {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* Hero */
.hero {
  padding: 120px 0 var(--section-pad);
  border-bottom: 1px solid var(--rule);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 28px;
}
.hero-eyebrow .pip {
  width: 6px; height: 6px; background: var(--accent);
  display: inline-block;
}
.hero h1 {
  font-size: clamp(48px, 5.6vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 28px;
  text-wrap: balance;
}
.hero h1 .accent { color: var(--accent); font-style: italic; font-weight: 500; }
.hero .lede {
  font-size: 19px;
  line-height: 1.5;
  color: var(--muted);
  max-width: 56ch;
  margin: 0 0 16px;
}
.hero .lede-th {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 56ch;
  margin: 0 0 40px;
  font-weight: 400;
  opacity: 0.75;
}
.hero .actions { display: flex; gap: 14px; margin-top: 8px; }
.hero .specs {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 28px;
  margin-top: 56px;
  font-size: 12px;
}
.hero .specs dt { color: var(--muted); letter-spacing: 0.06em; }
.hero .specs dd { margin: 0; color: var(--ink); }

.hero-mark {
  display: flex;
  justify-content: flex-end;
  position: relative;
}
.hero-mark .mark-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--rule);
  background: var(--paper);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-mark .mark-frame .corner {
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--rule);
  background: var(--bg);
}
.hero-mark .mark-frame .corner.tl { top: -7px; left: -7px; }
.hero-mark .mark-frame .corner.tr { top: -7px; right: -7px; }
.hero-mark .mark-frame .corner.bl { bottom: -7px; left: -7px; }
.hero-mark .mark-frame .corner.br { bottom: -7px; right: -7px; }
.hero-mark svg.brand-mark { width: 64%; height: 64%; }
.hero-mark .meta {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

/* What it is */
.what-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.lede-block h2 {
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 24px;
  max-width: 18ch;
}
.lede-block .accent { color: var(--accent); font-style: italic; font-weight: 500; }
.lede-block p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 52ch;
}
.principle-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.principle-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
  align-items: start;
}
.principle-list li:last-child { border-bottom: 1px solid var(--rule); }
.principle-list .num {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.12em;
  padding-top: 4px;
}
.principle-list h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.principle-list p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
  max-width: 50ch;
}

/* Agent flow */
.flow-stage {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: center;
}
.flow-canvas {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--rule);
  aspect-ratio: 16 / 11;
  overflow: hidden;
}
.flow-canvas svg {
  width: 100%;
  height: 100%;
  display: block;
}
.flow-controls {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}
.flow-controls button {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.15s ease;
}
.flow-controls button:hover { border-color: var(--ink); }
.flow-controls button.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.flow-explain h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.flow-explain h3 .accent { color: var(--accent); }
.flow-explain p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 44ch;
}
.flow-step-detail {
  margin-top: 20px;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  min-height: 140px;
}
.flow-step-detail .tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: 4px 8px;
  margin-bottom: 12px;
}
.flow-step-detail h5 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.flow-step-detail .th {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}
.flow-step-detail p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
  max-width: 48ch;
}

/* RBAC matrix */
.rbac-stage {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 56px;
}
.rbac-roles {
  display: flex;
  flex-direction: column;
}
.rbac-role-btn {
  text-align: left;
  padding: 18px 22px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  border-bottom: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 14px;
  align-items: center;
  transition: background 0.15s ease, border-color 0.15s ease;
  font-family: inherit;
}
.rbac-role-btn:last-child { border-bottom: 1px solid var(--rule); }
.rbac-role-btn:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }
.rbac-role-btn.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.rbac-role-btn.active + .rbac-role-btn { border-top-color: var(--ink); }
.rbac-role-btn .idx {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  opacity: 0.6;
}
.rbac-role-btn .name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.rbac-role-btn .clearance {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.7;
}

.rbac-detail {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 32px;
}
.rbac-detail h4 {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.015em;
}
.rbac-detail .role-th {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 24px;
}
.rbac-detail .perm-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 24px;
}
.rbac-detail .perm {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--rule);
  font-size: 13px;
}
.rbac-detail .perm.on { border-color: var(--accent); color: var(--ink); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.rbac-detail .perm.off { color: var(--muted); opacity: 0.55; }
.rbac-detail .perm .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--rule); flex: none;
}
.rbac-detail .perm.on .dot { background: var(--accent); }
.rbac-detail .clearance-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}
.rbac-detail .cl-cell {
  border: 1px solid var(--rule);
  padding: 14px 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.rbac-detail .cl-cell.on {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.rbac-detail .cl-label {
  display: block;
  font-size: 9px;
  opacity: 0.6;
  margin-bottom: 6px;
}
.rbac-detail .summary {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  padding-top: 18px;
  margin: 0;
}

/* Skill library */
.skill-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: stretch;
}
.skill-loop {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 40px;
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.skill-loop svg { width: 100%; height: 100%; }
.skill-explain h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.skill-explain p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 44ch;
}
.skill-stages {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.skill-stage-row {
  display: grid;
  grid-template-columns: 56px 1fr 80px;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  align-items: center;
}
.skill-stage-row:last-child { border-bottom: 1px solid var(--rule); }
.skill-stage-row .n {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.skill-stage-row h5 { margin: 0 0 2px; font-size: 14px; font-weight: 600; }
.skill-stage-row p { margin: 0; font-size: 12px; color: var(--muted); line-height: 1.5; }
.skill-stage-row .pill {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-align: right;
}

/* MCP */
.mcp-stage {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.mcp-diagram {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 48px;
  aspect-ratio: 5 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mcp-diagram svg { width: 100%; height: auto; }
.mcp-explain h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.mcp-explain p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 16px;
  max-width: 44ch;
}
.mcp-tools {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
}
.mcp-tools .tool {
  padding: 16px 18px;
  border-bottom: 1px solid var(--rule);
}
.mcp-tools .tool:nth-child(odd) { border-right: 1px solid var(--rule); }
.mcp-tools .tool .nm {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--ink);
  margin-bottom: 4px;
}
.mcp-tools .tool .ds {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

/* CTA */
.cta {
  padding: var(--section-pad) 0;
}
.cta-block {
  background: var(--ink);
  color: var(--paper);
  padding: 96px 64px;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 56px;
  align-items: center;
  position: relative;
}
.cta-block h2 {
  margin: 0 0 18px;
  font-size: 56px;
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 600;
  text-wrap: balance;
}
.cta-block h2 .accent { color: var(--accent); font-style: italic; font-weight: 500; }
.cta-block p {
  font-size: 16px;
  line-height: 1.55;
  color: rgba(255,255,255,0.7);
  margin: 0 0 32px;
  max-width: 44ch;
}
.cta-block .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-block .actions .btn { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.cta-block .actions .btn.ghost { background: transparent; color: var(--paper); border-color: rgba(255,255,255,0.3); }
.cta-block .actions .btn.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.cta-mark {
  display: flex;
  justify-content: center;
}
.cta-mark svg { width: 200px; height: 200px; opacity: 0.95; }

/* Footer */
.footer {
  padding: 48px 0 56px;
  border-top: 1px solid var(--rule);
}
.footer .row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  flex-wrap: wrap;
}
.footer .col h6 {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}
.footer .col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer .col a {
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
}
.footer .col a:hover { color: var(--accent); }
.footer .meta {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  display: flex;
  gap: 24px;
}

/* Language switch — hide non-active */
[data-lang="en"] .lang-th { display: none !important; }
[data-lang="th"] .lang-en { display: none !important; }
[data-lang="th"] body, [data-lang="th"] .body-th {
  font-family: "IBM Plex Sans Thai", "Inter", "Noto Sans Thai", -apple-system, sans-serif;
}

/* Layout: compact variant */
[data-layout="compact"] .section { padding: 64px 0; }
[data-layout="compact"] .hero { padding: 80px 0 64px; }
[data-layout="compact"] .container { padding: 0 32px; }

/* Responsive */
@media (max-width: 1100px) {
  .hero-grid, .what-grid, .flow-stage, .rbac-stage, .skill-stage, .mcp-stage, .cta-block {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-mark { justify-content: stretch; }
  .topnav nav { display: none; }
  .container { padding: 0 28px; }
}