/* ==========================================================================
   PULSE V2.2 — auth.css · "ION ATMOSPHERE"
   Shared by login.html · signup.html · forgot-password.html ·
   reset-password.html. The auth "terminal": one obsidian instrument card
   centered in the void — calm trace across its header, mono micro-labels,
   slab-grade presence. Requires tokens.css + base.css first.

   CONTRACT NOTE (binding): every id/name/data-* the verbatim v1 JS queries
   (login-page.js, signup-page.js, forgot/reset-password-page.js,
   password-toggle/strength/match.js, avatar-helper.js) is preserved in the
   page markup; this file also styles the nodes those scripts INJECT
   (.pw-toggle-wrap, .pw-toggle, .pw-caps-warn, .pw-strength, .pw-match-hint,
   .hint-ok, .hint-err, .btn-loading). Restyle here, never rename there.

   PERF: no filter: blur() on any large layer (void aura in base.css is the
   only sanctioned blur — do not add more).
   ========================================================================== */

/* --------------------------------------------------------------------------
   Stage — the void, content centered like a hero
   -------------------------------------------------------------------------- */
.auth-stage {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 38rem;
  min-height: max(82svh, 38rem);
  padding-block: var(--sp-8);
}

.auth-stage .container {
  display: grid;
  justify-items: center;
  width: 100%;
}

/* --------------------------------------------------------------------------
   The instrument card — slab tokens give it the monolith finish in both
   themes (face gradient, machined edge, drop + halo).
   -------------------------------------------------------------------------- */
.auth-card {
  position: relative;
  width: min(27.5rem, 100%);
  padding: var(--sp-7) var(--sp-6) var(--sp-6);
  background:
    linear-gradient(var(--slab-grad-1), var(--slab-grad-2)),
    var(--slab-face);
  border: 1px solid var(--slab-edge);
  border-top-color: var(--slab-edge-top);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-slab);
}
.auth-card--wide { width: min(30.5rem, 100%); }

/* Hairline seam under the card — the instrument sits on a lit bench */
.auth-seam {
  width: min(20rem, 70%);
  height: 1px;
  margin-top: var(--sp-5);
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
}

/* --------------------------------------------------------------------------
   Card header: kicker · minimal focus glow · H1 · sub
   -------------------------------------------------------------------------- */
.auth-head { margin-bottom: var(--sp-5); }

.auth-head .kicker { margin-bottom: var(--sp-3); }

/* The auth motif is calm by design: one soft breathing light above the
   card head — no instrument theatrics on a credentials page. */
.auth-glow {
  position: relative;
  height: 2.5rem;
  margin-bottom: var(--sp-4);
  pointer-events: none;
  background: radial-gradient(60% 100% at 50% 50%, var(--accent-tint-1), transparent 70%);
}
.auth-glow::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
}
html.anim .auth-glow { animation: auth-breathe 6s ease-in-out infinite; }
@keyframes auth-breathe {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

.auth-card h1 {
  font-size: var(--fs-h2);
  line-height: var(--lh-heading);
  letter-spacing: var(--track-tight);
  color: var(--text-1);
}

.auth-sub {
  margin-top: var(--sp-2);
  color: var(--text-3);
  font-size: var(--fs-body-sm);
}
.auth-sub a {
  color: var(--accent-bright);
  text-decoration: none;
}
.auth-sub a:hover,
.auth-sub a:focus-visible { text-decoration: underline; }

/* --------------------------------------------------------------------------
   Status regions — hidden until the verbatim JS sets style.display='block'
   (CSSOM writes; no inline style attributes needed in markup).
   -------------------------------------------------------------------------- */
.error-msg,
.success-msg,
.email-hint {
  display: none;
  margin-bottom: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body);
}
.error-msg {
  background: var(--danger-tint);
  border: 1px solid var(--danger);
  color: var(--text-1);
}
.error-msg a { color: var(--text-1); }
.success-msg {
  background: var(--accent-tint-2);
  border: 1px solid var(--accent-line);
  color: var(--text-1);
}
.success-msg a { color: var(--accent-bright); }
.email-hint {
  background: var(--wash-1);
  border: 1px solid var(--line-1);
  color: var(--text-2);
}

/* --------------------------------------------------------------------------
   Fields
   -------------------------------------------------------------------------- */
.field { margin-bottom: var(--sp-4); }

.field > label,
.avatar-field > label {
  display: block;
  margin-bottom: var(--sp-2);
  font: 700 var(--fs-micro) / 1 var(--font-mono);
  letter-spacing: var(--track-micro);
  text-transform: uppercase;
  color: var(--text-3);
}

.field input[type="text"],
.field input[type="email"],
.field input[type="password"] {
  width: 100%;
  padding: 0.7rem 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-md);
  color: var(--text-1);
  font: 400 var(--fs-body) / 1.4 var(--font-sans);
  transition: border-color var(--dur-1) ease, box-shadow var(--dur-1) ease;
}
.field input::placeholder { color: var(--text-4); }
.field input:hover { border-color: var(--line-3); }
.field input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint-1);
}

.hint {
  margin-top: var(--sp-2);
  font-size: var(--fs-micro);
  line-height: 1.5;
  color: var(--text-3);
}
/* States the verbatim JS toggles on the availability/status hints */
.hint-ok  { color: var(--accent-bright); }
.hint-err { color: var(--danger); }

.forgot {
  margin: calc(-1 * var(--sp-2)) 0 var(--sp-4);
  text-align: right;
  font-size: var(--fs-body-sm);
}
.forgot a { color: var(--text-3); text-decoration: none; }
.forgot a:hover,
.forgot a:focus-visible { color: var(--accent-bright); text-decoration: underline; }

/* --------------------------------------------------------------------------
   Password toggle (injected by password-toggle.js)
   -------------------------------------------------------------------------- */
.pw-toggle-wrap { position: relative; }
.pw-toggle-wrap input { padding-right: 2.8rem; }

.pw-toggle {
  position: absolute;
  top: 50%;
  right: 0.45rem;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: var(--radius-sm);
  color: var(--text-3);
  cursor: pointer;
  transition: color var(--dur-1) ease, background var(--dur-1) ease;
}
.pw-toggle:hover { color: var(--text-1); background: var(--wash-1); }
.pw-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  color: var(--text-1);
}
.pw-toggle svg { width: 1rem; height: 1rem; }

.pw-caps-warn {
  margin-top: var(--sp-2);
  font-size: var(--fs-micro);
  color: var(--danger);
}

/* --------------------------------------------------------------------------
   Strength meter (injected by password-strength.js) — 4 instrument segments
   -------------------------------------------------------------------------- */
.pw-strength {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-2);
}
.pw-strength-bars {
  display: flex;
  flex: 1;
  gap: 4px;
}
.pw-strength-bars span {
  height: 3px;
  flex: 1;
  border-radius: var(--radius-pill);
  background: var(--viz-track);
  transition: background var(--dur-2) var(--ease-glide);
}
.pw-strength-bars[data-score="1"] span:nth-child(-n+1),
.pw-strength-bars[data-score="2"] span:nth-child(-n+2) { background: var(--danger); }
.pw-strength-bars[data-score="3"] span:nth-child(-n+3) { background: var(--accent); }
.pw-strength-bars[data-score="4"] span { background: var(--accent-bright); }

.pw-strength-label {
  min-width: 4.2em;
  font: 700 var(--fs-micro) / 1 var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--text-3);
  text-align: right;
}

/* Live mismatch hint (injected by password-match.js) */
.pw-match-hint {
  margin-top: var(--sp-2);
  font-size: var(--fs-micro);
  color: var(--danger);
}
.field input.pw-mismatch { border-color: var(--danger); }

/* --------------------------------------------------------------------------
   Avatar picker (signup)
   -------------------------------------------------------------------------- */
.avatar-picker {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.avatar-img {
  width: 72px;
  height: 72px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: var(--surface-2);
  object-fit: cover;
}
.avatar-picker-actions { display: grid; gap: var(--sp-2); }
.avatar-upload-btn { justify-self: start; }
/* Keyboard a11y: the <label> proxies the visually-hidden file input */
.avatar-picker:has(#avatar-input:focus-visible) .avatar-upload-btn {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Buttons — submit + OAuth. .btn-loading is set by the verbatim JS.
   -------------------------------------------------------------------------- */
.btn-submit {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--accent);
  border: 0;
  border-radius: var(--radius-md);
  color: var(--accent-ink);
  font: 700 var(--fs-body) / 1 var(--font-sans);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: filter var(--dur-1) ease, transform var(--dur-1) var(--ease-glide), box-shadow var(--dur-1) ease;
}
.btn-submit:hover { filter: brightness(1.07); box-shadow: var(--glow-accent); }
.btn-submit:active { transform: translateY(1px); }
.btn-submit:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }
.btn-submit:disabled { opacity: 0.6; cursor: wait; }

.btn-loading { position: relative; }

.divider {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin: var(--sp-5) 0 var(--sp-4);
  font: 700 var(--fs-micro) / 1 var(--font-mono);
  letter-spacing: var(--track-micro);
  text-transform: uppercase;
  color: var(--text-4);
}
.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-1);
}

.btn-oauth {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  width: 100%;
  margin-bottom: var(--sp-3);
  padding: 0.7rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-md);
  color: var(--text-2);
  font: 500 var(--fs-body-sm) / 1 var(--font-sans);
  cursor: pointer;
  transition: border-color var(--dur-1) ease, background var(--dur-1) ease, color var(--dur-1) ease;
}
.btn-oauth:hover { background: var(--surface-3); border-color: var(--line-3); color: var(--text-1); }
.btn-oauth:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-oauth:disabled { opacity: 0.55; cursor: wait; }
.btn-oauth svg { flex: none; }

.terms-note {
  margin-top: var(--sp-4);
  font-size: var(--fs-micro);
  line-height: 1.6;
  color: var(--text-3);
}
.terms-note a { color: var(--text-2); }

/* Below-card row: back link */
.auth-below {
  margin-top: var(--sp-5);
  display: flex;
  justify-content: center;
}
.auth-below a {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--text-3);
  font-size: var(--fs-body-sm);
  text-decoration: none;
  transition: color var(--dur-1) ease;
}
.auth-below a:hover,
.auth-below a:focus-visible { color: var(--text-1); }

@media (max-width: 30em) {
  .auth-card { padding: var(--sp-6) var(--sp-4) var(--sp-5); }
}