:root {
  --ink: #0d1b2a;
  --cobalt: #1d4ed8;
  --sky: #38bdf8;
  --paper: #eaf0f5;
  --paper-2: #dde6ef;
  --paper-3: #cdd9e6;
  --slate: #354b6b;
  --steel: #7a8ba3;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Space Grotesk", "Helvetica Neue", Helvetica, sans-serif;
}
a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 18px 32px;
  background: rgba(234, 240, 245, 0.92);
  border-bottom: 2px solid var(--ink);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.brand { font-size: 28px; font-weight: 700; }
.brand span { color: var(--cobalt); }
nav { display: flex; gap: 18px; font-family: "JetBrains Mono", monospace; font-size: 12px; text-transform: uppercase; }
.nav-button {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  padding: 0;
  text-transform: uppercase;
}

.hero {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 34px;
  align-items: center;
  padding: 34px 32px 46px;
  border-bottom: 2px solid var(--ink);
}
.hero-copy { max-width: 820px; }
.eyebrow {
  margin: 0 0 14px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--slate);
}
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(34px, 5.2vw, 68px); line-height: 1.02; margin-bottom: 18px; letter-spacing: 0; }
h2 { font-size: clamp(30px, 4vw, 56px); line-height: 1.02; letter-spacing: 0; }
h3 { font-size: clamp(28px, 4vw, 46px); margin-bottom: 16px; letter-spacing: 0; }
.lede { color: var(--slate); font-size: 18px; line-height: 1.42; max-width: 680px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 14px 20px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 700;
}
.button.primary { background: var(--cobalt); border-color: var(--cobalt); color: var(--white); }
.button.ghost { background: transparent; }
.button.disabled {
  cursor: not-allowed;
  opacity: 0.58;
  pointer-events: none;
}
.button.danger { border-color: #b42318; color: #b42318; }
.button.danger:disabled { opacity: 0.5; }
.hero-media img {
  display: block;
  width: 100%;
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 14px 14px 0 var(--ink);
}

.strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 2px solid var(--ink);
}
.strip span {
  padding: 18px 24px;
  border-right: 2px solid var(--ink);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
}
.strip span:last-child { border-right: 0; }

.demos, .contact, .admin-main { padding: 64px 32px; }
.section-head { max-width: 900px; margin-bottom: 32px; }
.demo-layout { display: grid; grid-template-columns: 300px 1fr; gap: 24px; align-items: start; }
.demo-list, .demo-detail, .panel {
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--white);
}
.demo-list { overflow: hidden; }
.demo-list button {
  width: 100%;
  padding: 18px;
  border: 0;
  border-bottom: 2px solid var(--ink);
  background: var(--white);
  color: var(--ink);
  text-align: left;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.demo-list button:last-child { border-bottom: 0; }
.demo-list button.active { background: var(--ink); color: var(--paper); }
.demo-detail { min-height: 420px; padding: 32px; }
.demo-detail p { color: var(--slate); font-size: 18px; line-height: 1.55; }
.demo-detail ul { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 24px 0 32px; list-style: none; }
.demo-detail li, .chip {
  padding: 8px 12px;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}
.contact {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: center;
  background: var(--ink);
  color: var(--paper);
}
.contact .eyebrow { color: var(--sky); }

.admin-body { background: var(--paper-2); }
.admin-hero { padding-bottom: 36px; border-bottom: 2px solid var(--ink); margin-bottom: 32px; }
.admin-hero h1 { max-width: 980px; font-size: clamp(38px, 5vw, 72px); }
.admin-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 18px; }
.panel { padding: 24px; }
.panel h2 { font-size: 28px; margin-bottom: 18px; }
.panel.wide { margin-top: 18px; }
.panel-head { display: flex; justify-content: space-between; gap: 16px; align-items: center; margin-bottom: 16px; }
.login-panel { max-width: 720px; margin: 0 auto; }
.login-panel h1 { font-size: clamp(34px, 5vw, 58px); }
.login-form, .category-editor, .wpp-test-form {
  display: grid;
  gap: 16px;
}
.login-form label, .category-editor label, .wpp-test-form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}
input, textarea {
  width: 100%;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  padding: 12px 14px;
}
textarea { resize: vertical; }
.form-error { min-height: 24px; color: #b42318; font-weight: 700; }
.form-error.success { color: #147a3a; }
.wpp-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.qr-result {
  display: grid;
  place-items: center;
  min-height: 0;
  margin-bottom: 16px;
  color: var(--slate);
  overflow-wrap: anywhere;
}
.qr-result img {
  width: min(100%, 260px);
  border: 2px solid var(--ink);
  border-radius: 8px;
}
.qr-result code {
  display: block;
  max-height: 180px;
  overflow: auto;
  padding: 12px;
  background: var(--paper);
  border: 1.5px solid var(--ink);
}
.connection-ok {
  width: 100%;
  display: grid;
  gap: 6px;
  padding: 14px;
  border: 2px solid #147a3a;
  border-radius: 8px;
  background: #e7f7ed;
  color: #0d4f28;
}
.connection-ok span {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}
.session-action-result {
  margin: 0 0 10px;
  color: var(--slate);
  font-weight: 700;
}
.status-list { margin: 0; }
.status-list div, .category-row, .conversation-row, .lead-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--paper-3);
}
.status-list dt, .category-row span, .category-actions span { font-family: "JetBrains Mono", monospace; color: var(--slate); font-size: 12px; }
.status-list dd { margin: 0; text-align: right; }
.category-row p { margin: 6px 0 0; color: var(--slate); }
.category-editor {
  padding: 18px 0;
  border-bottom: 1px solid var(--paper-3);
}
.category-editor:first-child { padding-top: 0; }
.category-editor-head, .category-actions, .toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.toggle-row {
  justify-content: flex-end;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  font-weight: 600;
}
.toggle-row input { width: auto; }
.conversation-row p { margin: 6px 0 0; color: var(--slate); }
.row-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.lead-row {
  display: block;
}
.lead-row p {
  margin: 6px 0 0;
  color: var(--slate);
}
.message-list {
  display: grid;
  gap: 10px;
}
.message-row {
  border: 1.5px solid var(--ink);
  border-radius: 8px;
  padding: 12px 14px;
  background: var(--paper);
}
.message-row span {
  display: block;
  margin-bottom: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--slate);
  text-transform: uppercase;
}
.message-row p { margin: 0; white-space: pre-wrap; }
.message-row.assistant { background: var(--paper-2); }
.empty { color: var(--slate); }

@media (max-width: 860px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero, .demo-layout, .admin-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .strip { grid-template-columns: 1fr 1fr; }
  .contact { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .site-header, .hero, .demos, .contact, .admin-main { padding-left: 18px; padding-right: 18px; }
  nav { flex-wrap: wrap; }
  h1 { font-size: clamp(32px, 10vw, 44px); }
  .lede { font-size: 16px; }
  .strip { grid-template-columns: 1fr; }
  .strip span { border-right: 0; border-bottom: 2px solid var(--ink); }
  .hero-media img { box-shadow: 8px 8px 0 var(--ink); }
}