/* ─────────────────────────────────────────────────────────────────────
 * RidgeAI v4 — Sign-in page
 *
 * Editorial Bone card on top of the recolored shader nebula.
 * On load, an oxblood "aura" radial behind the card breathes inward
 * (a "swoosh from the stars" entrance) and the card scale-fades in.
 * ─────────────────────────────────────────────────────────────── */

.login-body {
  margin: 0;
  min-height: 100vh;
  background: var(--dark);
  color: var(--text-on-dark);
  font-family: var(--font-body);
  position: relative;
  overflow-x: hidden;
}

/* Shader canvas behind everything */
.login-shader {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  pointer-events: none;
  opacity: 0.85;
}

/* "Aura" — a radial oxblood glow that pulses behind the card */
.login-aura {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 90vmax;
  height: 90vmax;
  transform: translate(-50%, -50%);
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(circle at center,
    rgba(139, 31, 26, 0.32) 0%,
    rgba(139, 31, 26, 0.0)  35%,
    rgba(47, 42, 38, 0.78) 70%);
  animation: login-aura-pulse 6s ease-in-out infinite;
}
@keyframes login-aura-pulse {
  0%, 100% { opacity: 0.85; transform: translate(-50%, -50%) scale(1);    }
  50%      { opacity: 1.0;  transform: translate(-50%, -50%) scale(1.05); }
}

/* ── Stage ────────────────────────────────────────────────────── */
.login-stage {
  position: relative;
  z-index: 3;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-10) var(--s-5);
}

.login-back {
  position: fixed;
  top: var(--s-6);
  left: var(--s-6);
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(246, 242, 236, 0.7);
  transition: color var(--t-fast) var(--ease);
}
.login-back:hover { color: var(--accent); }

/* ── Form card — bone surface, scale-in entrance ─────────────── */
.login-card {
  width: 100%;
  max-width: 460px;
  background: var(--bg);
  color: var(--text);
  padding: var(--s-10) var(--s-10) var(--s-8);
  border: 1px solid rgba(218, 211, 199, 0.6);
  box-shadow:
    0 60px 120px rgba(0, 0, 0, 0.55),
    0 24px 48px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(139, 31, 26, 0.18),
    0 0 80px rgba(139, 31, 26, 0.25);
  position: relative;
  animation: login-card-in 1100ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
@media (max-width: 520px) {
  .login-card { padding: var(--s-8) var(--s-6); }
}
@keyframes login-card-in {
  0%   { opacity: 0; transform: scale(0.86) translateY(20px); filter: blur(6px); }
  60%  { opacity: 1; filter: blur(0); }
  100% { opacity: 1; transform: scale(1)    translateY(0);    filter: blur(0); }
}

/* ── Brand ────────────────────────────────────────────────────── */
.login-card__head {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  margin-bottom: var(--s-6);
  padding-bottom: var(--s-5);
  border-bottom: 1px solid var(--line);
}
.login-brand {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text);
}
.login-brand .b { color: var(--accent); font-weight: 500; }
.login-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-left: auto;
}

/* ── Tabs ─────────────────────────────────────────────────────── */
.login-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  padding: 1px;
  margin-bottom: var(--s-6);
}
.login-tab {
  background: var(--surface-2);
  color: var(--text-muted);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
  border: 0;
}
.login-tab:hover { color: var(--text); background: var(--bg); }
.login-tab.active,
.auth-tab.active {
  background: var(--dark);
  color: var(--text-on-dark);
}

/* ── Form section ─────────────────────────────────────────────── */
.login-form {
  display: none;
}
.login-form.active,
.auth-form.active {
  display: block;
  animation: login-form-in 320ms var(--ease-out) both;
}
@keyframes login-form-in {
  0%   { opacity: 0; transform: translateY(6px); }
  100% { opacity: 1; transform: translateY(0);   }
}

.login-h {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-2);
  color: var(--text);
}
.login-lede {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-soft);
  margin: 0 0 var(--s-6);
}

/* ── Field ────────────────────────────────────────────────────── */
.login-field {
  display: block;
  margin-bottom: var(--s-5);
}
.login-field__lbl {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 8px;
}
.login-field__hint {
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--text-muted);
}
.login-field__consent {
  display: block;
  margin-top: var(--s-2);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.login-field input {
  width: 100%;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  outline: 0;
  transition: border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}
.login-field input::placeholder {
  color: var(--text-muted);
  opacity: 0.65;
}
.login-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 31, 26, 0.18);
}

/* ── Buttons ──────────────────────────────────────────────────── */
.login-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  min-height: 50px;
  border: 0;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease),
              transform 80ms var(--ease);
}
.login-btn:active { transform: scale(0.985); }
.login-btn--primary {
  background: var(--accent);
  color: var(--text-on-dark);
}
.login-btn--primary:hover { background: var(--accent-deep); }
.login-btn--primary:disabled {
  background: var(--line-strong);
  cursor: not-allowed;
  opacity: 0.6;
}
.login-btn--google {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line-strong);
  letter-spacing: 0.08em;
}
.login-btn--google:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.login-btn__arr {
  font-family: var(--font-body);
  font-size: 16px;
  letter-spacing: 0;
  transition: transform var(--t-fast) var(--ease);
}
.login-btn:hover .login-btn__arr { transform: translateX(3px); }

/* ── Forgot password / divider / fine print ─────────────────── */
.login-forgot {
  text-align: right;
  margin-top: var(--s-2);
  margin-bottom: var(--s-2);
}
.login-forgot .btn-link {
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 4px 0;
}
.login-forgot .btn-link:hover { color: var(--accent); }

.login-divider {
  position: relative;
  text-align: center;
  margin: var(--s-6) 0 var(--s-5);
}
.login-divider::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px;
  background: var(--line);
}
.login-divider span {
  position: relative;
  background: var(--bg);
  padding: 0 var(--s-3);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.login-fine {
  margin: var(--s-4) 0 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  line-height: 1.5;
}
.login-fine a {
  color: var(--text-soft);
  border-bottom: 1px dotted var(--text-muted);
}
.login-fine a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Error + success messages ─────────────────────────────────── */
.login-error,
.error-msg {
  display: none;
  background: rgba(139, 31, 26, 0.10);
  color: var(--accent);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin-bottom: var(--s-5);
}
.login-error:not(:empty),
.error-msg:not(:empty) { display: block; }

.login-success,
.success-msg {
  display: none;
  background: rgba(62, 107, 62, 0.12);
  color: var(--ok);
  border-left: 3px solid var(--ok);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin-bottom: var(--s-5);
}
.login-success.show,
.success-msg.show { display: block; }

/* Reduced motion: skip the entrance choreography */
@media (prefers-reduced-motion: reduce) {
  .login-card { animation: none; }
  .login-aura { animation: none; opacity: 0.5; }
  .login-form.active { animation: none; }
}