/* ═══════════════════════════════════════════════════════════════
   Auth — unified login / sign-in experience
   Vertical panel · curved hero cap · ambient background
   ═══════════════════════════════════════════════════════════════ */

:root {
  --auth-radius: 24px;
  --auth-radius-sm: 14px;
  --auth-radius-input: 12px;
  --auth-brand: #1976D2;
  --auth-brand-light: #3B82F6;
  --auth-brand-deep: #1565C0;
  --auth-parent-brand: #1976D2;
  --auth-parent-deep: #1565C0;
  --auth-shadow: 0 2px 16px rgba(25, 118, 210, 0.07), 0 6px 28px rgba(25, 118, 210, 0.12);
  --auth-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --auth-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Scene & ambient background ─────────────────────────────── */

.auth-body {
  min-height: 100vh;
  margin: 0;
  color: var(--text-1);
  position: relative;
  overflow-x: hidden;
}

[data-theme='light'] .auth-body {
  background: #F7FAFF;
}

[data-theme='light'] .parent-auth-body {
  background: #F7FAFF;
  font-family: 'Plus Jakarta Sans', 'DM Sans', 'Inter', system-ui, sans-serif;
}

[data-theme='dark'] .auth-body {
  background: #0c1220;
}

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

.auth-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(21, 101, 192, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 101, 192, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 20%, transparent 75%);
}

[data-theme='dark'] .auth-bg-grid {
  background-image:
    linear-gradient(rgba(66, 165, 245, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 165, 245, 0.06) 1px, transparent 1px);
}

.auth-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  animation: auth-orb-float 18s ease-in-out infinite;
}

.auth-bg-orb--1 {
  width: 420px;
  height: 420px;
  top: -8%;
  right: -6%;
  background: radial-gradient(circle, rgba(66, 165, 245, 0.45), transparent 70%);
}

.auth-bg-orb--2 {
  width: 360px;
  height: 360px;
  bottom: -10%;
  left: -8%;
  background: radial-gradient(circle, rgba(21, 101, 192, 0.35), transparent 70%);
  animation-delay: -6s;
}

.auth-bg-orb--3 {
  width: 200px;
  height: 200px;
  top: 40%;
  left: 15%;
  background: radial-gradient(circle, rgba(100, 181, 246, 0.3), transparent 70%);
  animation-delay: -12s;
}

.parent-auth-body .auth-bg-orb--1 {
  background: radial-gradient(circle, rgba(191, 219, 254, 0.55) 0%, transparent 70%);
}

.parent-auth-body .auth-bg-orb--2 {
  background: radial-gradient(circle, rgba(187, 222, 251, 0.45) 0%, transparent 70%);
}

.parent-auth-body .auth-bg-orb--3 {
  background: radial-gradient(circle, rgba(239, 246, 255, 0.85) 0%, transparent 70%);
}

@keyframes auth-orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(24px, -18px) scale(1.04); }
  66% { transform: translate(-16px, 12px) scale(0.97); }
}

/* ── Centering wrapper ──────────────────────────────────────── */

.auth-wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 16px;
}

/* ── Main panel (vertical card — new shape) ─────────────────── */

.auth-panel {
  width: min(440px, 100%);
  border-radius: var(--auth-radius);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--auth-shadow);
  border: 1px solid #E0E0E0;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  overflow: hidden;
  animation: auth-panel-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.parent-auth-body .auth-panel {
  background: rgba(255, 255, 255, 0.78);
  border-color: #E0E0E0;
  box-shadow: 0 2px 16px rgba(25, 118, 210, 0.07), 0 8px 32px rgba(25, 118, 210, 0.12);
}

@keyframes auth-panel-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Curved hero cap */
.auth-panel-hero {
  position: relative;
  padding: 1.15rem 1.5rem 1.65rem;
  background: linear-gradient(135deg, var(--auth-brand-deep) 0%, var(--auth-brand) 48%, var(--auth-brand-light) 100%);
  color: #fff;
  text-align: center;
}

.auth-panel-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 18px;
  background: var(--card);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.parent-auth-body .auth-panel-hero {
  background: linear-gradient(135deg, var(--auth-parent-deep) 0%, var(--auth-parent-brand) 55%, #3B82F6 100%);
}

.parent-auth-body .auth-panel-hero::after {
  background: rgba(255, 255, 255, 0.78);
}

.auth-panel-hero-inner {
  position: relative;
  z-index: 1;
}

.auth-hero-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 0.55rem;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

.auth-panel-hero h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: #fff;
}

.auth-hero-tagline {
  margin: 0.25rem 0 0;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
}

/* Panel body */
.auth-panel-body {
  padding: 0.35rem 1.5rem 1.35rem;
}

/* ── Page headings ──────────────────────────────────────────── */

.auth-heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

.auth-heading-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  color: var(--auth-brand);
  background: color-mix(in srgb, var(--auth-brand) 10%, transparent);
}

.parent-auth-body .auth-heading-icon {
  color: var(--auth-parent-brand);
  background: color-mix(in srgb, var(--auth-parent-brand) 10%, transparent);
}

.auth-lead {
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--text-3);
  margin: 0 0 0.85rem;
}

/* ── Forms ──────────────────────────────────────────────────── */

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.auth-field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 0.4rem;
}

.auth-field-hint {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.35rem;
  line-height: 1.4;
}

.auth-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.auth-input-icon {
  position: absolute;
  left: 14px;
  color: var(--text-3);
  font-size: 0.875rem;
  pointer-events: none;
  transition: color var(--auth-transition);
  z-index: 1;
}

.auth-input-wrap:focus-within .auth-input-icon {
  color: var(--auth-brand);
}

.parent-auth-body .auth-input-wrap:focus-within .auth-input-icon {
  color: var(--auth-parent-brand);
}

.auth-input-wrap .form-control {
  padding-left: 2.65rem;
  padding-right: 0.85rem;
  height: 42px;
  border-radius: var(--auth-radius-input);
  border: 1.5px solid var(--border);
  background: var(--bg);
  font-size: 0.9375rem;
  transition: border-color var(--auth-transition), box-shadow var(--auth-transition), background var(--auth-transition);
}

.auth-input-wrap .form-control:focus {
  border-color: var(--auth-brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--auth-brand) 18%, transparent);
  background: var(--card);
}

.parent-auth-body .auth-input-wrap .form-control:focus {
  border-color: var(--auth-parent-brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--auth-parent-brand) 18%, transparent);
}

.auth-input-wrap--code .form-control {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
  font-size: 1.125rem;
  letter-spacing: 0.2em;
  text-align: center;
  padding-left: 0.85rem;
}

.auth-input-wrap--toggle .form-control {
  padding-right: 2.75rem;
}

.auth-toggle-pw {
  position: absolute;
  right: 4px;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--text-3);
  border-radius: 8px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color var(--auth-transition), background var(--auth-transition);
}

.auth-toggle-pw:hover {
  color: var(--text-1);
  background: color-mix(in srgb, var(--text-1) 6%, transparent);
}

.auth-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.auth-label-row label {
  margin-bottom: 0;
}

.auth-link {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--auth-brand);
  text-decoration: none;
  transition: color var(--auth-transition);
}

.auth-link:hover {
  color: var(--auth-brand-light);
  text-decoration: underline;
}

.parent-auth-body .auth-link {
  color: var(--auth-parent-brand);
}

/* ── Buttons ────────────────────────────────────────────────── */

.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 44px;
  padding: 0 1.25rem;
  border: none;
  border-radius: var(--auth-radius-input);
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(135deg, var(--auth-brand) 0%, var(--auth-brand-light) 100%);
  box-shadow: 0 6px 20px rgba(66, 165, 245, 0.35);
  transition: transform var(--auth-transition), box-shadow var(--auth-transition), filter var(--auth-transition);
}

.auth-btn:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(66, 165, 245, 0.42);
  color: #fff;
}

.auth-btn:active {
  transform: translateY(0);
}

.parent-auth-body .auth-btn {
  background: linear-gradient(135deg, var(--auth-parent-deep) 0%, var(--auth-parent-brand) 100%);
  box-shadow: 0 6px 20px rgba(25, 118, 210, 0.28);
  border-radius: 12px;
}

.parent-auth-body .auth-btn:hover {
  box-shadow: 0 8px 24px rgba(25, 118, 210, 0.38);
}

.auth-btn i {
  font-size: 0.875rem;
  transition: transform var(--auth-transition);
}

.auth-btn:hover i {
  transform: translateX(2px);
}

.auth-actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.auth-actions-row--end {
  justify-content: flex-end;
}

.auth-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-3);
  text-decoration: none;
  margin-bottom: 0.65rem;
  transition: color var(--auth-transition);
}

.auth-label-row--after {
  margin-top: 0.35rem;
  margin-bottom: 0;
}

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

.parent-auth-body .auth-back-link:hover {
  color: var(--auth-parent-brand);
}

/* ── Parent login progress (step-based) ─────────────────────── */

.auth-progress {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 0.85rem;
}

.auth-progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  flex: 0 0 auto;
  min-width: 52px;
}

.auth-progress-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-3);
  background: color-mix(in srgb, var(--text-1) 6%, var(--bg));
  border: 2px solid var(--border);
  transition: background var(--auth-transition), border-color var(--auth-transition), color var(--auth-transition);
}

.auth-progress-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-3);
  transition: color var(--auth-transition);
}

.auth-progress-step.is-active .auth-progress-dot {
  color: #fff;
  background: linear-gradient(135deg, var(--auth-parent-deep) 0%, var(--auth-parent-brand) 100%);
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.auth-progress-step.is-active .auth-progress-label {
  color: var(--auth-parent-brand);
}

.auth-progress-step.is-complete .auth-progress-dot {
  color: #fff;
  background: #22c55e;
  border-color: transparent;
}

.auth-progress-step.is-complete .auth-progress-label {
  color: var(--text-2);
}

.auth-progress-line {
  flex: 1;
  height: 2px;
  margin: 0 0.5rem;
  margin-bottom: 0.85rem;
  background: var(--border);
  border-radius: 1px;
  transition: background var(--auth-transition);
}

.auth-progress-line.is-complete {
  background: linear-gradient(90deg, #22c55e, var(--auth-parent-brand));
}

.auth-phone-chip {
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
}

.auth-phone-display {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--auth-radius-input);
  border: 1.5px solid var(--border);
  background: color-mix(in srgb, var(--text-1) 3%, var(--bg));
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-1);
}

.auth-phone-display i {
  color: var(--text-3);
  font-size: 0.875rem;
}

.auth-phone-change {
  margin-left: auto;
  font-size: 0.8125rem;
}

.auth-switch {
  margin: 0.35rem 0 0;
  text-align: center;
  font-size: 0.8125rem;
}

.auth-hint {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-2);
}

.auth-switch .auth-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ── Tabs (legacy) ──────────────────────────────────────────── */

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  margin-bottom: 1.25rem;
  background: color-mix(in srgb, var(--text-1) 4%, var(--bg));
  border-radius: var(--auth-radius-sm);
  border: 1px solid var(--border);
  position: relative;
}

.auth-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-3);
  border-radius: 10px;
  transition: color var(--auth-transition), background var(--auth-transition), box-shadow var(--auth-transition);
  position: relative;
  z-index: 1;
}

.auth-tab:hover {
  color: var(--text-1);
}

.auth-tab.is-active {
  background: var(--card);
  color: var(--auth-parent-brand);
  box-shadow: var(--auth-shadow-sm);
}

.auth-tab i {
  font-size: 0.8rem;
}

/* ── Feature list (parent) ──────────────────────────────────── */

.auth-features {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--border);
}

.auth-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.4rem 0;
  font-size: 0.8125rem;
  color: var(--text-3);
  line-height: 1.45;
}

.auth-features li i {
  color: #22c55e;
  font-size: 0.75rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

/* ── Demo / info blocks ─────────────────────────────────────── */

.auth-demo {
  margin-top: 0.85rem;
  border-radius: var(--auth-radius-sm);
  border: 1px dashed color-mix(in srgb, var(--auth-brand) 35%, var(--border));
  background: color-mix(in srgb, var(--auth-brand) 4%, var(--bg));
  overflow: hidden;
}

.auth-demo summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--auth-transition);
}

.auth-demo summary::-webkit-details-marker {
  display: none;
}

.auth-demo summary::before {
  content: '\f04b';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.65rem;
  color: var(--auth-brand);
  transition: transform var(--auth-transition);
}

.auth-demo[open] summary::before {
  transform: rotate(90deg);
}

.auth-demo summary:hover {
  background: color-mix(in srgb, var(--auth-brand) 6%, transparent);
}

.auth-demo-body {
  padding: 0 1rem 1rem;
  font-size: 0.8125rem;
}

.auth-demo-body code {
  font-size: 0.8rem;
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  background: color-mix(in srgb, var(--text-1) 6%, transparent);
}

.auth-demo-table {
  width: 100%;
  margin-top: 0.75rem;
  font-size: 0.8rem;
}

.auth-demo-table th {
  font-weight: 600;
  color: var(--text-3);
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
}

.auth-demo-table td {
  padding: 0.4rem 0;
  color: var(--text-2);
}

.auth-demo-table td code {
  font-size: 0.75rem;
}

.auth-alert-demo {
  border-radius: var(--auth-radius-sm);
  border: 1px dashed color-mix(in srgb, var(--auth-parent-brand) 40%, var(--border));
  background: color-mix(in srgb, var(--auth-parent-brand) 6%, var(--bg));
  padding: 0.85rem 1rem;
  margin-bottom: 0.25rem;
}

.auth-alert-demo-label {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-bottom: 0.35rem;
}

.auth-alert-demo code {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--auth-parent-brand);
  user-select: all;
}

/* ── Trust strip ────────────────────────────────────────────── */

.auth-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-3);
}

.auth-trust i {
  color: #22c55e;
  font-size: 0.7rem;
}

/* ── Responsive ─────────────────────────────────────────────── */

@media (max-width: 480px) {
  .auth-wrap {
    padding: 12px 10px;
  }

  .auth-panel {
    border-radius: 20px;
  }

  .auth-panel-hero {
    padding: 1rem 1.15rem 1.45rem;
  }

  .auth-panel-body {
    padding: 0.25rem 1.15rem 1.15rem;
  }

  .auth-hero-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .auth-panel-hero h2 {
    font-size: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-panel,
  .auth-bg-orb {
    animation: none;
  }

  .auth-btn:hover {
    transform: none;
  }
}