:root {
  --color-bg-primary: #08080d;
  --color-bg-secondary: rgba(255, 255, 255, 0.04);
  --color-bg-tertiary: rgba(255, 255, 255, 0.06);
  --color-text-primary: rgba(255, 255, 255, 0.92);
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-tertiary: rgba(255, 255, 255, 0.5);
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-secondary: #60a5fa;
  --color-glass-bg: rgba(255, 255, 255, 0.06);
  --color-glass-border: rgba(255, 255, 255, 0.12);
  --color-success: #22c55e;
  --color-error: #ef4444;

  /* Foundation mirror (resiapp_design_system.css) */
  --font-display: 'Sora', var(--font-heading);
  --color-text-faint: rgba(255, 255, 255, 0.55);
  --glass-blur: 24px;
  --glass-saturate: 160%;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;

  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 12px 48px rgba(0, 0, 0, 0.4);
  --shadow-hard: 0 20px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);

  --font-sans: var(--font-heading);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg-primary);
  min-height: 100vh;
  color: var(--color-text-primary);
  position: relative;
  overflow-x: hidden;
}

.checkout-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px 80px;
  position: relative;
  z-index: 1;
}

.checkout-shell {
  width: 100%;
  max-width: 1120px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.checkout-card {
  position: relative;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-top-color: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    var(--shadow-glow);
  overflow: hidden;
}

/* Top-edge specular line (matches .auth-card / .auth-shell) */
.checkout-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 1px;
  border-radius: 1px;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.2) 25%,
      rgba(255, 255, 255, 0.35) 50%,
      rgba(255, 255, 255, 0.2) 75%,
      transparent);
  pointer-events: none;
  z-index: 5;
}

.checkout-card__header {
  padding: 28px 28px 22px;
  background: linear-gradient(135deg,
      rgba(15, 42, 82, 0.55) 0%,
      rgba(15, 42, 82, 0.35) 55%,
      rgba(15, 30, 60, 0.45) 100%);
  border-bottom: 1px solid var(--color-glass-border);
}

.checkout-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.checkout-logo {
  font-family: var(--font-display);
  font-size: var(--fs-5xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.checkout-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-glass-border);
  color: var(--color-text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.checkout-title {
  font-family: var(--font-display);
  font-size: var(--fs-4xl);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.checkout-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--fs-lg);
  line-height: 1.6;
}

.checkout-card__header .journey {
  margin-top: 18px;
}

.checkout-card__body {
  padding: 28px;
}

.checkout-flash-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-label {
  display: block;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-hint {
  margin-top: 6px;
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

.form-input {
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: var(--gradient-glass);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1.5px solid var(--color-gray-900);
  border-radius: 12px;
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  font-family: inherit;
  line-height: 1.4;
  color: var(--color-gray-50);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.form-input:focus {
  outline: none;
  border-color: rgba(var(--da-gold-rgb), 0.5);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  box-shadow: 0 0 0 3px rgba(var(--da-gold-rgb), 0.15), 0 8px 20px rgba(0, 0, 0, 0.2);
}

.form-input::placeholder {
  color: var(--color-gray-500);
}

/* Inline field validation states */
.form-input--error {
  border-color: rgba(239, 68, 68, 0.5);
}

.form-input--error:focus {
  border-color: rgba(239, 68, 68, 0.6);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15), 0 8px 20px rgba(0, 0, 0, 0.2);
}

.form-input--ok {
  border-color: rgba(34, 197, 94, 0.35);
}

.field-error {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: #f87171;
  line-height: 1.4;
}

.field-error[hidden] {
  display: none;
}

.password-requirements {
  margin-top: 10px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  border: 1px solid var(--color-glass-border);
}

.password-requirements small {
  display: block;
  font-weight: var(--fw-semibold);
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.requirements-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--fs-base);
}

.requirements-list li {
  padding: 4px 0;
  color: var(--color-text-tertiary);
  transition: color 0.18s ease;
}

.requirements-list li.valid {
  color: var(--color-success);
}

/* Single source of glyphs: the ::before pseudo-element */
.requirements-list li::before {
  content: '✗ ';
  display: inline-block;
}

.requirements-list li.valid::before {
  content: '✓ ';
  animation: reqPop 0.25s ease;
}

@keyframes reqPop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.12); }
  100% { transform: scale(1); }
}

.password-match-msg {
  margin-top: 8px;
  display: none;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: 1.3;
}

.password-match-msg--ok {
  display: block;
  color: var(--color-success);
}

.password-match-msg--error {
  display: block;
  color: var(--color-error);
}

.form-actions {
  margin-top: 10px;
}

/* Submit — same royal→silver gradient recipe as .auth-submit */
.submit-button {
  width: 100%;
  padding: 15px 18px;
  background: linear-gradient(135deg, var(--da-royal, #0F2A52) 0%, var(--da-silver, #5C6168) 100%);
  color: #fff;
  border: 1.5px solid rgba(var(--da-gold-rgb), 0.25);
  border-radius: 12px;
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(var(--da-gold-rgb), 0.15),
              inset 0 1px 0 rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.submit-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.submit-button:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, rgba(var(--da-royal-rgb), 0.95) 0%, rgba(var(--da-royal-rgb), 0.85) 100%);
  box-shadow: 0 8px 25px rgba(var(--da-gold-rgb), 0.3),
              inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.submit-button:hover::before {
  opacity: 1;
}

.submit-button:active {
  transform: translateY(-1px);
}

.submit-button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

/* Loading state — spinner pattern shared with the auth screens */
.submit-button--loading {
  pointer-events: none;
  opacity: 0.85;
}

.submit-button--loading .btn-text {
  opacity: 0;
}

.submit-button--loading .btn-spinner {
  display: block;
}

.btn-spinner {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 22px;
  height: 22px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: checkoutSpin 0.65s linear infinite;
}

@keyframes checkoutSpin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.inline-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: var(--fw-semibold);
}

.inline-link:hover {
  color: var(--color-text-primary);
}

.helper-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
}

.side-card {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-top-color: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  padding: 22px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    var(--shadow-soft);
}

.side-card + .side-card {
  margin-top: 16px;
}

.side-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-extrabold);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.plan-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.plan-name {
  font-weight: var(--fw-extrabold);
  font-size: var(--fs-xl);
  line-height: 1.2;
}

.plan-price {
  font-weight: var(--fw-extrabold);
  font-size: var(--fs-3xl);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.plan-desc {
  margin-top: 6px;
  color: var(--color-text-secondary);
  font-size: var(--fs-md);
  line-height: 1.5;
}

.checklist {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checklist-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--color-text-secondary);
  font-size: var(--fs-md);
  line-height: 1.4;
}

.checklist-dot {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--fs-xs);
  font-weight: var(--fw-black);
}

.security-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
}

.security-badge svg {
  width: 18px;
  height: 18px;
}

.checkout-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 12px 16px;
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-glass-border);
}

.checkout-footer a {
  color: var(--color-text-secondary);
  text-decoration: none;
  margin: 0 10px;
  font-weight: var(--fw-semibold);
}

.checkout-footer a:hover {
  color: var(--color-text-primary);
}

/* ============================================
   ENTRANCE ANIMATIONS (ported from auth_login.css)
   ============================================ */

@keyframes checkoutFadeIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes checkoutSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.checkout-animate-shell {
  animation: checkoutFadeIn 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.checkout-animate-1 { animation: checkoutSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both; }
.checkout-animate-2 { animation: checkoutSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.30s both; }
.checkout-animate-3 { animation: checkoutSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both; }
.checkout-animate-4 { animation: checkoutSlideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both; }

@media (max-width: 960px) {
  .checkout-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .checkout-page {
    padding-top: 22px;
    padding-bottom: 92px;
  }

  .checkout-card__body {
    padding: 22px;
  }

  .checkout-card__header {
    padding: 22px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .checkout-footer {
    position: static;
    background: transparent;
    backdrop-filter: none;
    border-top: none;
    padding: 20px 16px 28px;
  }

  .checkout-page {
    padding-bottom: 32px;
  }
}

/* ============================================
   REDUCED MOTION (Accessibility)
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .checkout-animate-shell,
  .checkout-animate-1,
  .checkout-animate-2,
  .checkout-animate-3,
  .checkout-animate-4,
  .requirements-list li.valid::before {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
  }

  .submit-button,
  .submit-button:hover,
  .form-input,
  .requirements-list li {
    transition-duration: 0.01ms !important;
    transform: none;
  }
}