/* The Signal Collective — shared styling for the auth pucks (login/signup/recovery).
   Served by the sdk puck at /sdk/auth.css; pairs with /sdk/auth-flow.js.
   Editorial register (APE/tsc-design-system.json): a dark masthead like the
   nav, a flat square surface with a rust top rule, a taxonomy label, a
   partial-italic display headline, body serif for copy and inputs, DM Sans for
   labels and buttons. No rounded corners, no shadows, rust only for emphasis. */

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Masthead: the nav component's dark bar, wordmark only ── */
.auth-masthead {
  background: var(--bg-surface-dark);
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-6, 24px);
}
.auth-wordmark {
  font-family: var(--font-display);
  font-size: var(--text-heading-lg, 1.333rem);
  color: var(--text-inverted);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.auth-wordmark:hover { color: var(--text-inverted); text-decoration: none; }

/* ── Card: flat surface, hairline border, rust top rule ── */
.auth-card {
  box-sizing: border-box;
  width: calc(100% - 2 * var(--space-4, 16px));
  max-width: 28rem;
  margin: var(--space-16, 64px) auto var(--space-12, 48px);
  background: var(--bg-surface);
  border: var(--border-hairline, 1px) solid var(--border-default);
  border-top: var(--border-accent-width, 4px) solid var(--border-accent);
  border-radius: var(--radius-none, 0);
  padding: var(--space-12, 48px) var(--space-10, 40px);
}

/* Taxonomy label: — SECTION · SUBSECTION, uppercase, tracked, rust. */
.auth-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3, 12px);
  font-family: var(--font-ui);
  font-size: var(--text-label-sm);
  font-weight: 500;
  letter-spacing: var(--ls-label-sm);
  text-transform: uppercase;
  color: var(--text-accent);
  margin: 0 0 var(--space-4, 16px);
}
.auth-eyebrow::before {
  content: '';
  width: 24px;
  border-top: 2px solid var(--color-rust-500);
}
.auth-title {
  font-family: var(--font-display);
  font-size: var(--text-display-md);
  line-height: var(--lh-display-md, 1.15);
  letter-spacing: var(--ls-display-md);
  font-weight: 400;
  margin: 0 0 var(--space-4, 16px);
}
.auth-title em { font-style: italic; }
.auth-dek {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 var(--space-8, 32px);
}

/* ── Fields ── */
.field { margin-bottom: var(--space-5, 20px); }
.field label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-label-md);
  font-weight: 500;
  letter-spacing: var(--ls-label-md);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-2, 8px);
}
.field input {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  line-height: 1.4;
  padding: var(--space-3, 12px);
  background: var(--bg-page);
  border: var(--border-hairline, 1px) solid var(--border-strong);
  border-radius: var(--radius-none, 0);
  color: var(--text-primary);
}
.field input:focus {
  outline: 2px solid var(--interactive-focus-ring);
  outline-offset: 1px;
  border-color: var(--border-accent);
}
.field input[aria-invalid="true"] { border-color: var(--color-rust-600); }
.field-hint {
  font-family: var(--font-ui);
  font-size: var(--text-body-sm);
  line-height: 1.5;
  color: var(--text-secondary);
  margin: var(--space-2, 8px) 0 0;
}
.field-message {
  font-family: var(--font-ui);
  font-size: var(--text-body-sm);
  color: var(--color-rust-600);
  margin-top: var(--space-2, 8px);
}

/* ── Buttons: accent for the flow's submit, ghost for "back" steps ── */
button[type="submit"] {
  width: 100%;
  font-family: var(--font-ui);
  font-size: var(--text-label-md);
  font-weight: 600;
  letter-spacing: var(--ls-label-md);
  text-transform: uppercase;
  color: var(--text-inverted);
  background: var(--interactive-accent-bg, var(--color-rust-500));
  border: var(--border-hairline, 1px) solid var(--border-accent);
  border-radius: var(--radius-none, 0);
  padding: var(--space-4, 16px);
  cursor: pointer;
  margin-top: var(--space-3, 12px);
}
button[type="submit"]:hover { background: var(--color-rust-600); }
button[type="submit"]:focus-visible {
  outline: 2px solid var(--interactive-focus-ring);
  outline-offset: 2px;
}
button[type="submit"]:disabled { opacity: 0.5; cursor: not-allowed; }
button[type="submit"].auth-secondary {
  color: var(--text-primary);
  background: transparent;
  border-color: var(--border-strong);
}
button[type="submit"].auth-secondary:hover { border-color: var(--text-primary); }

/* ── Flow messages: the callout pattern ── */
.messages { margin-bottom: var(--space-6, 24px); }
.message {
  font-family: var(--font-ui);
  font-size: var(--text-body-sm);
  line-height: 1.5;
  padding: var(--space-3, 12px) var(--space-4, 16px);
  border: var(--border-hairline, 1px) solid var(--border-subtle);
  border-left: var(--border-accent-width, 4px) solid var(--border-accent);
  background: var(--bg-surface-warm);
  margin-bottom: var(--space-2, 8px);
}
.message.error { color: var(--color-rust-700); }

.auth-text {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 var(--space-4, 16px);
}
.auth-link {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: var(--text-body-sm);
  color: var(--text-link);
  margin-bottom: var(--space-3, 12px);
}
.auth-img { max-width: 100%; margin-bottom: var(--space-4, 16px); }

/* ── Alternate route (sign in / join / forgot), below a hairline ── */
.auth-alt {
  font-family: var(--font-ui);
  font-size: var(--text-body-sm);
  color: var(--text-secondary);
  border-top: var(--border-hairline, 1px) solid var(--border-subtle);
  padding-top: var(--space-6, 24px);
  margin: var(--space-8, 32px) 0 0;
}
.auth-alt + .auth-alt { border-top: none; padding-top: 0; margin-top: var(--space-2, 8px); }
.auth-alt a,
.auth-link { text-decoration: underline; text-underline-offset: 3px; }
.auth-alt a:hover,
.auth-link:hover { color: var(--text-link-hover); }

@media (max-width: 480px) {
  .auth-masthead { padding: 0 var(--space-4, 16px); }
  .auth-card {
    margin-top: var(--space-8, 32px);
    padding: var(--space-8, 32px) var(--space-5, 20px);
  }
  .auth-title { font-size: var(--text-display-sm); line-height: var(--lh-display-sm, 1.2); }
}