/*
  Kontakt design tokens, translated from ai/06-frontend-ux-stitch-brief.md
  §2-3 into plain CSS custom properties. No CDN fonts (Google Fonts would
  leak visitor IPs to a third party on a privacy-first contact page — see
  ai/04-privacy-policy-draft.md "we don't share your info"), so headings
  and body copy fall back to strong system font stacks tuned to read like
  the intended Space Grotesk / Inter pairing.
*/
:root {
  --color-paper: #FAFAF7;
  --color-ink: #12151B;
  --color-ink-muted: #6B6F76;
  --color-ink-faint: #E4E6EA;
  --color-accent: #2451FF;
  --color-accent-ink: #FFFFFF;
  --color-warning: #E8A33D;
  --color-warning-bg: #FDF3E3;
  --color-success: #1E7A5F;
  --color-danger: #C43D3D;

  --font-display: "Space Grotesk", "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;

  --radius: 12px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;

  --target-min: 48px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

main {
  flex: 1;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-2) var(--space-6);
}

.tag-label {
  font-size: 28px;
  line-height: 1.2;
}

.owner-note {
  margin-top: var(--space-1);
  color: var(--color-ink-muted);
  font-size: 15px;
}

.section {
  margin-top: var(--space-4);
}

.label-sm {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-1);
}

.chip {
  font-family: var(--font-body);
  font-size: 14px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-ink-faint);
  background: #fff;
  color: var(--color-ink);
  cursor: pointer;
  min-height: var(--target-min);
  transition: background-color 200ms ease-out, border-color 200ms ease-out;
}
.chip:hover, .chip:focus-visible { background: var(--color-ink-faint); }
.chip:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

textarea, input[type="text"], input[type="email"], input[type="tel"] {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-ink);
  background: #fff;
  border: 1px solid var(--color-ink-faint);
  border-radius: var(--radius);
  padding: var(--space-2);
  resize: vertical;
}
textarea:focus, input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-accent);
}

.char-counter {
  display: block;
  text-align: right;
  font-size: 12px;
  color: var(--color-ink-muted);
  margin-top: 4px;
}
.char-counter.over { color: var(--color-danger); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: var(--target-min);
  padding: 12px 24px;
  border-radius: var(--radius);
  border: none;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 200ms ease-out, opacity 200ms ease-out;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  width: 100%;
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn-primary:hover:not(:disabled) { background: #1c3fd6; }

.btn-secondary {
  background: #fff;
  color: var(--color-ink);
  border: 1px solid var(--color-ink-faint);
  width: 100%;
}
.btn-secondary:hover { background: var(--color-ink-faint); }

.disclose-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-1);
}
.disclose-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-ink-faint);
  background: #fff;
  color: var(--color-ink);
  text-decoration: none;
  font-size: 14px;
  min-height: var(--target-min);
}
.disclose-pill:hover { background: var(--color-ink-faint); }

details.contact-info {
  margin-top: var(--space-3);
  border: 1px solid var(--color-ink-faint);
  border-radius: var(--radius);
  padding: var(--space-2);
  background: #fff;
}
details.contact-info summary {
  cursor: pointer;
  font-weight: 600;
  min-height: var(--target-min);
  display: flex;
  align-items: center;
}
.contact-fields { display: grid; gap: var(--space-1); margin-top: var(--space-2); }
.field-label { font-size: 13px; color: var(--color-ink-muted); margin-bottom: 4px; display: block; }

.warning {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: var(--space-1);
  padding: 12px;
  border-left: 3px solid var(--color-warning);
  background: var(--color-warning-bg);
  border-radius: 6px;
  font-size: 13px;
  color: var(--color-ink); /* amber contrast rule: sentence stays ink-colored, never amber text */
}

.privacy-notice {
  margin-top: var(--space-3);
  font-size: 13px;
  color: var(--color-ink-muted);
  text-align: center;
}
.privacy-notice a { color: var(--color-accent); text-decoration: underline; }

.attach-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: var(--target-min);
  padding: 0 var(--space-2);
  border-radius: var(--radius);
  border: 1px solid var(--color-ink-faint);
  background: #fff;
  color: var(--color-ink);
  font-size: 14px;
}

.banner {
  margin-top: var(--space-2);
  padding: 12px 16px;
  border-radius: 8px;
  background: var(--color-ink-faint);
  color: var(--color-ink);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.banner.danger { background: #FBE9E9; color: var(--color-danger); }

.centered-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: var(--space-6);
}
.icon-circle {
  width: 96px;
  height: 96px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--color-ink-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  font-size: 40px;
}
.icon-circle.success { color: var(--color-success); border-color: var(--color-success); }

footer {
  padding: var(--space-3) var(--space-2);
  border-top: 1px solid var(--color-ink-faint);
  background: #fff;
  text-align: center;
  font-size: 13px;
  color: var(--color-ink-muted);
}
footer a { color: inherit; text-decoration: none; margin: 0 8px; }
footer a:hover { color: var(--color-accent); }
footer strong { color: var(--color-ink); }

.hidden { display: none !important; }

/*
  Utility/modifier classes below replace what used to be inline `style="..."`
  attributes and JS-driven `.style.x = y` mutations. The CSP is intentionally
  strict (style-src 'self', no 'unsafe-inline') — both inline style attributes
  and CSSOM mutations are covered by that directive, so anything not expressed
  as a stylesheet rule is silently dropped by the browser instead of erroring.
*/
.mt-1 { margin-top: var(--space-1); }
.label-block { display: block; margin-bottom: 6px; }
.owner-note--wide { margin-top: 16px; max-width: 380px; }
.banner--block { display: block; margin-top: var(--space-1); }
.banner--warning { margin-top: var(--space-2); background: var(--color-warning-bg); border-left: 3px solid var(--color-warning); }
.link-accent { color: var(--color-accent); }

/* Honeypot field: pulled off-screen, never `display:none` (see contact.html comment). */
.honeypot { position: absolute; left: -9999px; top: -9999px; }
.thread-link-cta { margin-top: var(--space-3); max-width: 280px; }

/* Home page */
.home-hero { padding-top: 64px; }
.home-title { font-size: 32px; }
.home-lede { max-width: 400px; margin-top: 16px; }
.home-hint { margin-top: 24px; font-size: 13px; }

/* Legal pages */
.legal-main { max-width: 640px; }
.legal-main--wide { max-width: 680px; }
.legal-main table { width: 100%; border-collapse: collapse; margin: var(--space-2) 0; font-size: 14px; }
.legal-main th, .legal-main td { text-align: left; padding: 8px; border-bottom: 1px solid var(--color-ink-faint); vertical-align: top; }
.legal-main th { font-family: var(--font-display); font-size: 13px; }
.legal-main h2 { font-family: var(--font-display); font-size: 18px; margin-top: var(--space-4); }

@media (max-width: 380px) {
  main { padding: var(--space-3) var(--space-2) var(--space-4); }
  .tag-label { font-size: 24px; }
}

/*
  Two-way anonymous thread page (t.html). Fixed header/input-bar with an
  independently-scrolling message list in between — the one layout in this
  app that isn't the standard centered-column page shell.
*/
.thread-body { height: 100vh; overflow: hidden; margin: 0; }
.thread-chat {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 560px;
  margin: 0 auto;
}
.thread-header {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--color-ink-faint);
  background: #fff;
  flex-shrink: 0;
}
.thread-back {
  color: var(--color-ink);
  text-decoration: none;
  font-size: 20px;
  min-width: var(--target-min);
  min-height: var(--target-min);
  display: flex;
  align-items: center;
  justify-content: center;
}
.thread-tag-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.thread-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}
.thread-banner {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 10px 12px;
  margin: 0 0 var(--space-2);
  background: var(--color-ink-faint);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--color-ink-muted);
}
.bubble-row {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-2);
  max-width: 80%;
}
.bubble-row-owner { align-items: flex-start; margin-right: auto; }
.bubble-row-visitor { align-items: flex-end; margin-left: auto; }
.bubble-label {
  font-size: 11px;
  color: var(--color-ink-muted);
  margin-bottom: 2px;
  padding: 0 4px;
}
.bubble {
  margin: 0;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
}
.bubble-owner {
  background: var(--color-ink-faint);
  color: var(--color-ink);
  border-top-left-radius: 4px;
}
.bubble-visitor {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-top-right-radius: 4px;
}
.thread-input-bar {
  display: flex;
  gap: var(--space-1);
  align-items: flex-end;
  padding: var(--space-2);
  border-top: 1px solid var(--color-ink-faint);
  background: #fff;
  flex-shrink: 0;
}
.thread-input-bar textarea {
  flex: 1;
  border-radius: 999px;
  padding: 12px 16px;
  max-height: 120px;
  resize: none;
}
.thread-send {
  width: var(--target-min);
  height: var(--target-min);
  border-radius: 999px;
  border: none;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
}
.thread-send:hover:not(:disabled) { background: #1c3fd6; }
.thread-send:disabled { opacity: 0.55; cursor: not-allowed; }