/* ═══════════════════════════════════════════════
   KAIROS — Auth Page Styles
═══════════════════════════════════════════════ */

.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--obsidian);
  position: relative;
  overflow: hidden;
}

.auth-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.auth-bg__glow {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse at center,
    rgba(201,151,58,0.12) 0%,
    transparent 65%
  );
  animation: glow-pulse 8s ease-in-out infinite;
}

.auth-bg__grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 80% at 100% 0%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 100% 0%, black 20%, transparent 80%);
}

.auth-back {
  position: fixed;
  top: var(--sp-6);
  left: var(--sp-6);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--white-50);
  transition: color var(--t-fast);
}

.auth-back:hover { color: var(--white); }

.auth-main {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100vh;
}

/* ── BRAND PANEL ─────────────────────────────── */
.auth-brand {
  width: 420px;
  flex-shrink: 0;
  padding: var(--sp-16) var(--sp-12);
  display: flex;
  flex-direction: column;
  gap: var(--sp-10);
  border-right: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--obsidian-2) 0%, var(--obsidian) 100%);
}

.auth-brand__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.auth-brand__copy h2 {
  font-size: var(--text-3xl);
  line-height: 1.2;
  margin-bottom: var(--sp-4);
}

.auth-brand__copy em { color: var(--amber-bright); }

.auth-brand__copy p {
  font-size: var(--text-base);
  color: var(--white-50);
  line-height: 1.75;
}

.auth-brand__features {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  margin-top: auto;
}

.auth-brand__feature {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--text-sm);
  color: var(--white-70);
}

.auth-brand__feature-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--amber-glow);
  border: 1px solid var(--border-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--amber);
}

.auth-brand__version {
  font-size: var(--text-xs);
  color: var(--white-20, rgba(255,255,255,0.2));
  letter-spacing: 0.08em;
}

/* ── AUTH FORM PANEL ─────────────────────────── */
.auth-form-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-8);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-lift), var(--shadow-card);
}

/* ── TABS ────────────────────────────────────── */
.auth-tabs {
  display: flex;
  gap: var(--sp-1);
  padding: 4px;
  background: var(--obsidian-4);
  border-radius: var(--r-lg);
  margin-bottom: var(--sp-8);
}

.auth-tab {
  flex: 1;
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--white-40, rgba(255,255,255,0.4));
  border-radius: var(--r-md);
  transition: all var(--t-base) var(--ease);
  background: transparent;
  border: none;
  cursor: pointer;
  letter-spacing: 0.01em;
}

.auth-tab--active {
  background: var(--surface-2);
  color: var(--white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

/* ── PANEL ───────────────────────────────────── */
.auth-panel__header {
  margin-bottom: var(--sp-6);
}

.auth-panel__header h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--sp-1);
}

.auth-panel__header p {
  font-size: var(--text-sm);
  color: var(--white-40, rgba(255,255,255,0.4));
  margin: 0;
}

/* ── FIELD OVERRIDES FOR AUTH ────────────────── */
.field {
  margin-bottom: var(--sp-4);
}

.field label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white-50);
  margin-bottom: var(--sp-2);
}

.field-link {
  color: var(--amber);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  transition: color var(--t-fast);
}

.field-link:hover { color: var(--amber-bright); }

.field-input-wrap {
  position: relative;
}

.field-input-wrap input {
  padding-right: var(--sp-10);
}

.field-toggle {
  position: absolute;
  right: var(--sp-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--white-30);
  transition: color var(--t-fast);
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
}

.field-toggle:hover { color: var(--white-70); }

.field-error {
  font-size: var(--text-xs);
  color: var(--error);
  margin-top: var(--sp-1);
  min-height: 16px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}

.field-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}

.field-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--amber);
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
}

.field-checkbox label {
  font-size: var(--text-xs);
  color: var(--white-50);
  letter-spacing: 0;
  text-transform: none;
  font-weight: 400;
  line-height: 1.5;
}

.field-checkbox label a {
  color: var(--amber);
  text-decoration: underline;
  text-decoration-color: rgba(201,151,58,0.4);
}

/* Password Strength */
.password-strength {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-2);
}

.password-strength__bar {
  flex: 1;
  height: 3px;
  background: var(--obsidian-5);
  border-radius: 2px;
  overflow: hidden;
}

.password-strength__fill {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  transition: width 0.4s var(--ease), background 0.4s;
  background: var(--error);
}

.password-strength__fill.weak   { width: 25%; background: var(--error); }
.password-strength__fill.fair   { width: 50%; background: var(--warning); }
.password-strength__fill.good   { width: 75%; background: #86efac; }
.password-strength__fill.strong { width: 100%; background: var(--success); }

.password-strength__label {
  font-size: var(--text-xs);
  color: var(--white-30);
  white-space: nowrap;
}

/* Form-level messages */
.form-error {
  padding: var(--sp-3) var(--sp-4);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  color: var(--error);
  margin-bottom: var(--sp-4);
}

.form-success {
  padding: var(--sp-3) var(--sp-4);
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  color: var(--success);
  margin-bottom: var(--sp-4);
}

/* Auth divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin: var(--sp-6) 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

.auth-divider span {
  font-size: var(--text-xs);
  color: var(--white-30);
  letter-spacing: 0.06em;
}

.auth-switch {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--white-40, rgba(255,255,255,0.4));
  margin: var(--sp-5) 0 0;
}

.auth-switch a {
  color: var(--amber);
  font-weight: 500;
  transition: color var(--t-fast);
}

.auth-switch a:hover { color: var(--amber-bright); }

/* Responsive */
@media (max-width: 900px) {
  .auth-brand { display: none; }
  .auth-main { justify-content: center; align-items: center; }
}

@media (max-width: 480px) {
  .auth-form-panel { padding: var(--sp-4); }
  .auth-card { padding: var(--sp-6); }
  .field-row { grid-template-columns: 1fr; }
}