/* ================================================================
   auth.css — Sign In & Register Pages
   ================================================================ */

/* ── Full-page layout ────────────────────────────────────────── */
.auth-page {
  min-height: calc(100vh - 52px);
  display: flex; align-items: center; justify-content: center;
  padding: 40px 20px 60px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(79,70,229,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(99,102,241,0.04) 0%, transparent 60%),
    var(--color-slate-50);
}

/* ── Card ────────────────────────────────────────────────────── */
.auth-card {
  width: 100%; max-width: 420px; background: #fff;
  border: 1px solid var(--color-slate-200); border-radius: 16px;
  box-shadow: 0 1px 3px rgba(15,23,42,.05), 0 8px 32px rgba(15,23,42,.08), 0 20px 60px rgba(15,23,42,.04);
  overflow: hidden; animation: auth-fade-in 500ms var(--ease) both;
}

/* Shared slide-in animation (card, alerts, errors) */
@keyframes auth-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Hero header ─────────────────────────────────────────────── */
.auth-hero {
  position: relative; padding: 32px 32px 28px;
  background: linear-gradient(135deg, var(--color-brand-50) 0%, #fff 80%);
  border-bottom: 1px solid var(--color-brand-100);
  display: flex; align-items: center; gap: 16px;
}
.auth-hero::before {
  content: ''; position: absolute; left: 0; top: 16px; bottom: 16px;
  width: 4px; border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--color-brand) 0%, var(--color-brand-400) 100%);
}
.auth-hero-icon {
  width: 48px; height: 48px; border-radius: 14px;
  background: linear-gradient(135deg, var(--color-brand-hi) 0%, var(--color-brand) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 20px; flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(79,70,229,.30), 0 4px 16px rgba(79,70,229,.15);
}
.auth-hero-text { flex: 1; min-width: 0; }
.auth-hero-title {
  font-size: 20px; font-weight: 700; color: var(--color-slate-900);
  letter-spacing: -0.03em; margin: 0 0 2px; line-height: 1.2;
}
.auth-hero-sub { font-size: 13px; color: var(--color-slate-500); margin: 0; line-height: 1.4; }

/* ── Card body ───────────────────────────────────────────────── */
.auth-body { padding: 28px 32px 32px; }

/* ── Flash messages ──────────────────────────────────────────── */
.auth-alert {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px; border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500; margin-bottom: 20px;
  border: 1px solid; line-height: 1.4;
  animation: auth-fade-in 300ms var(--ease) both;
}
.auth-alert i { font-size: 16px; flex-shrink: 0; }
.auth-alert--error {
  background: var(--color-danger-50); border-color: var(--color-danger-border); color: var(--color-danger-text);
}
.auth-alert--success {
  background: var(--color-success-50); border-color: var(--color-success-border); color: var(--color-success-text);
}

/* ── Form fields ─────────────────────────────────────────────── */
.auth-field { margin-bottom: 20px; }
.auth-label {
  display: block; font-size: 12.5px; font-weight: 600;
  color: var(--color-slate-700); letter-spacing: 0.01em; margin-bottom: 6px;
}
.auth-input {
  width: 100%; height: 44px; padding: 0 14px;
  font-family: var(--font-sans); font-size: 16px; font-weight: 500;
  color: var(--color-slate-800); background: var(--color-slate-50);
  border: 1.5px solid var(--color-slate-200); border-radius: var(--radius-md);
  outline: none;
  transition: border-color 150ms var(--ease), box-shadow 150ms var(--ease), background 150ms var(--ease);
}
.auth-input::placeholder { color: var(--color-slate-400); font-weight: 400; }
.auth-input:hover { border-color: var(--color-slate-300); }
.auth-input:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px var(--color-brand-glow); background: #fff;
}

/* Invalid state */
.auth-input--invalid {
  border-color: var(--color-danger-hi); background: #fff;
  animation: auth-shake 400ms var(--ease);
}
.auth-input--invalid:focus {
  border-color: var(--color-danger-hi);
  box-shadow: 0 0 0 3px rgba(239,68,68,.10); background: #fff;
}
@keyframes auth-shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-5px); }
  40%      { transform: translateX(5px); }
  60%      { transform: translateX(-3px); }
  80%      { transform: translateX(2px); }
}

.auth-field-error {
  display: inline-block; font-size: 11.5px; font-weight: 500;
  color: var(--color-danger-text); background: var(--color-danger-50);
  border: 1px solid var(--color-danger-border); border-radius: 6px;
  padding: 4px 10px; margin-top: 6px;
  animation: auth-fade-in 250ms var(--ease) both;
}

/* ── Submit button ───────────────────────────────────────────── */
.auth-submit-btn { margin-top: 24px; border-radius: var(--radius-md); }
.auth-submit-btn i { font-size: 16px; }

/* ── Footer link ─────────────────────────────────────────────── */
.auth-footer {
  text-align: center; margin-top: 22px; padding-top: 18px;
  border-top: 1px solid var(--color-slate-100);
  font-size: 13px; color: var(--color-slate-500);
}
.auth-footer a { color: var(--color-brand); font-weight: 600; text-decoration: none; transition: color 140ms; }
.auth-footer a:hover { color: var(--color-brand-dark); text-decoration: underline; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 480px) {
  .auth-page { padding: 32px 16px 40px; align-items: flex-start; }
  .auth-card { border-radius: 14px; }
  .auth-hero { padding: 24px 20px 20px; }
  .auth-body { padding: 22px 20px 26px; }
  .auth-hero-icon { width: 42px; height: 42px; border-radius: 12px; font-size: 18px; }
  .auth-hero-title { font-size: 18px; }
}
@media (max-width: 767px) {
  .auth-page { padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px)); }
}