:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --border: #eaeaea;
  --text: #000000;
  --muted: #666666;
  --invert-bg: #000000;
  --invert-text: #ffffff;
  --error: #e5484d;
  --radius: 6px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #000000;
    --border: #333333;
    --text: #ffffff;
    --muted: #888888;
    --invert-bg: #ffffff;
    --invert-text: #000000;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  padding: 24px;
  padding-top: max(24px, env(safe-area-inset-top));
  padding-bottom: max(24px, env(safe-area-inset-bottom));
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

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

.wrap {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.brand {
  text-align: center;
  margin-bottom: 4px;
}

.logo-lockup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 0 10px;
}

.logo-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: 6px;
  padding: 4px;
}

.logo {
  display: block;
}

.brand h1 {
  font-size: 15px;
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: -0.02em;
  margin: 0;
}

.tag {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

.card[hidden] {
  display: none;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

#reveal-gate,
#reveal-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#reveal-content[hidden] {
  display: none;
}

textarea {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: transparent;
}

textarea:focus,
select:focus,
input:focus {
  outline: none;
  border-color: var(--text);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}

select {
  font: inherit;
  font-size: 12px;
  padding: 6px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--invert-bg);
  cursor: pointer;
}

.password-field[hidden] {
  display: none;
}

.password-field {
  display: flex;
  gap: 10px;
}

.password-field input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 14px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}

.password-field button {
  flex-shrink: 0;
  padding: 9px 14px;
  font-size: 12px;
}

button {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius);
  padding: 9px 16px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: opacity 0.12s ease, background-color 0.12s ease;
}

button.primary {
  background: var(--invert-bg);
  color: var(--invert-text);
  border-color: var(--invert-bg);
}

button.primary:hover:not(:disabled) {
  opacity: 0.85;
}

button.primary:disabled {
  opacity: 0.4;
  cursor: default;
}

button.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

button.ghost:hover {
  border-color: var(--text);
}

.link-row {
  display: flex;
  gap: 10px;
}

.link-row input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}

#copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  flex-shrink: 0;
}

#copy-btn:hover {
  border-color: var(--text);
}

.muted {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

.small {
  font-size: 12px;
}

.error {
  color: var(--error);
  font-size: 13px;
  margin: 0;
}

#revealed-text {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin: 0;
}

.foot {
  margin-top: 32px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
  letter-spacing: -0.01em;
}

.foot .sep {
  margin: 0 6px;
}

.foot a {
  color: var(--muted);
}

.foot a:hover {
  color: var(--text);
}

.page-how-it-works.wrap {
  max-width: 560px;
  gap: 16px;
}

.prose h2 {
  font-size: 15px;
  margin: 0;
  font-weight: 600;
}

.prose p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose ol,
.prose ul {
  margin: 0 0 10px;
  padding-left: 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}

.prose ul:last-child,
.prose ol:last-child {
  margin-bottom: 0;
}

.prose li + li {
  margin-top: 6px;
}

.prose li strong {
  color: var(--text);
}

.prose code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

.url-sample {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin: 0 0 12px;
  overflow-x: auto;
  white-space: nowrap;
}

.back-link {
  display: block;
  text-align: center;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  font-size: 13px;
  transition: border-color 0.12s ease, background-color 0.12s ease;
}

.back-link:hover {
  border-color: var(--text);
  background: var(--border);
}

@media (max-width: 480px) {
  body {
    padding: 16px;
    padding-top: max(16px, env(safe-area-inset-top));
    padding-bottom: max(16px, env(safe-area-inset-bottom));
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .wrap {
    gap: 28px;
  }

  .card {
    padding: 20px;
    gap: 20px;
  }

  /* 16px min font-size on inputs prevents iOS Safari from auto-zooming on focus */
  textarea,
  select,
  input {
    font-size: 16px;
  }

  textarea {
    min-height: 140px;
  }

  button {
    width: 100%;
    padding: 13px 16px;
    font-size: 15px;
  }

  .row {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  select {
    width: 100%;
    padding: 10px 12px;
  }

  .password-field button {
    width: auto;
    padding: 9px 14px;
    font-size: 12px;
  }

  .link-row {
    flex-direction: column;
  }

  .link-row input {
    padding: 12px;
  }
}