/* ═══════════════════════════════════════════════════════════════
   Friends of the Falls of Schuylkill Library — Checkout Styles
   ═══════════════════════════════════════════════════════════════ */

/* ── Google Fonts ────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ───────────────────────────────────────────── */
:root {
  /* Primary palette — Library Blue & White */
  --color-primary:        #2E5999;
  --color-primary-dark:   #1E3D6B;
  --color-primary-light:  #4A7CC9;
  --color-primary-faded:  rgba(46, 89, 153, 0.08);
  --color-primary-ghost:  rgba(46, 89, 153, 0.04);

  /* Neutrals */
  --color-white:          #FFFFFF;
  --color-bg:             #F4F6F9;
  --color-surface:        #FFFFFF;
  --color-border:         #D8DDE6;
  --color-border-light:   #E8ECF1;
  --color-text:           #1A2332;
  --color-text-secondary: #5A6577;
  --color-text-muted:     #8896A8;

  /* Accents */
  --color-success:        #22875A;
  --color-success-bg:     #E8F5EE;
  --color-error:          #C53030;
  --color-error-bg:       #FEE2E2;
  --color-gold:           #C9A84C;

  /* Shadows */
  --shadow-sm:   0 1px 2px rgba(26, 35, 50, 0.05);
  --shadow-md:   0 4px 12px rgba(26, 35, 50, 0.08);
  --shadow-lg:   0 8px 30px rgba(26, 35, 50, 0.12);
  --shadow-glow: 0 0 20px rgba(46, 89, 153, 0.15);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Radii */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* ── Base Reset ──────────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Decorative Background ───────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url('bookshelf-bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -2;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(244, 246, 249, 0.90);
  z-index: -1;
}

/* ── Main Container ──────────────────────────────────────────── */
.checkout-container {
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-2xl);
}

/* ── Header ──────────────────────────────────────────────────── */
.checkout-header {
  text-align: center;
  color: var(--color-primary-dark);
  padding: var(--space-2xl) 0 var(--space-xl);
  animation: fadeInDown var(--duration-slow) var(--ease-out);
}

.checkout-header__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  display: block;
  animation: floatSlow 3s ease-in-out infinite;
}

.checkout-header__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}

.checkout-header__subtitle {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
}

.checkout-header__badge {
  display: inline-block;
  margin-top: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-primary-faded);
  border: 1px solid rgba(46, 89, 153, 0.15);
  border-radius: 100px;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── Card Section (each form section) ────────────────────────── */
.section-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  animation: fadeInUp var(--duration-slow) var(--ease-out) both;
}

.section-card:nth-child(2) { animation-delay: 80ms; }
.section-card:nth-child(3) { animation-delay: 160ms; }
.section-card:nth-child(4) { animation-delay: 240ms; }
.section-card:nth-child(5) { animation-delay: 320ms; }

.section-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-card__title-icon {
  font-size: 1.1rem;
}

.section-card__description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

/* ── Tier Selection Grid ─────────────────────────────────────── */
.tier-grid {
  display: grid;
  gap: var(--space-sm);
}

.tier-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    background var(--duration-normal) var(--ease-out);
  user-select: none;
}

.tier-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.tier-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-faded);
  box-shadow: var(--shadow-glow);
}

.tier-card.selected .tier-card__radio {
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.tier-card.selected .tier-card__radio::after {
  transform: scale(1);
}

.tier-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.tier-card__radio {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.tier-card__radio::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-white);
  transform: scale(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.tier-card__info {
  flex: 1;
  min-width: 0;
}

.tier-card__name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.tier-card__desc {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 1px;
}

.tier-card__price {
  flex-shrink: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.tier-card__price-plus {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Literati custom amount */
.custom-amount-wrapper {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--duration-slow) var(--ease-out),
    opacity var(--duration-normal) var(--ease-out),
    margin var(--duration-slow) var(--ease-out);
  margin-top: 0;
}

.custom-amount-wrapper.visible {
  max-height: 100px;
  opacity: 1;
  margin-top: var(--space-md);
}

.custom-amount-wrapper label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.custom-amount-input {
  position: relative;
  display: flex;
  align-items: center;
}

.custom-amount-input__symbol {
  position: absolute;
  left: var(--space-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  pointer-events: none;
}

.custom-amount-input input {
  width: 160px;
  padding: var(--space-sm) var(--space-md) var(--space-sm) calc(var(--space-md) + 1rem);
  font-size: 1.1rem;
  font-weight: 600;
  font-family: var(--font-body);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: border-color var(--duration-normal) var(--ease-out);
}

.custom-amount-input input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 89, 153, 0.1);
}

/* ── Form Inputs ─────────────────────────────────────────────── */
.form-grid {
  display: grid;
  gap: var(--space-md);
}

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

.form-group {
  display: flex;
  flex-direction: column;
}

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

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-xs);
}

.form-group label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-group input,
.form-group select {
  padding: 0.7rem var(--space-md);
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition:
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 89, 153, 0.1);
}

.form-group input::placeholder {
  color: var(--color-text-muted);
  font-weight: 400;
}

.form-group input.error,
.form-group select.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(197, 48, 48, 0.08);
}

.form-error-msg {
  font-size: 0.75rem;
  color: var(--color-error);
  margin-top: 4px;
  min-height: 1rem;
  opacity: 0;
  transform: translateY(-4px);
  transition: all var(--duration-fast) var(--ease-out);
}

.form-error-msg.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Volunteer Section ───────────────────────────────────────── */
.volunteer-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.volunteer-toggle__label {
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.95rem;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 50px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch__track {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: background var(--duration-normal) var(--ease-out);
}

.toggle-switch__track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: var(--color-white);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-out);
}

.toggle-switch input:checked + .toggle-switch__track {
  background: var(--color-primary);
}

.toggle-switch input:checked + .toggle-switch__track::after {
  transform: translateX(22px);
}

.toggle-switch input:focus-visible + .toggle-switch__track {
  box-shadow: 0 0 0 3px rgba(46, 89, 153, 0.2);
}

/* Volunteer options list */
.volunteer-options {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--duration-slow) var(--ease-out),
    opacity var(--duration-normal) var(--ease-out),
    padding var(--duration-slow) var(--ease-out);
  padding-top: 0;
}

.volunteer-options.visible {
  max-height: 600px;
  opacity: 1;
  padding-top: var(--space-md);
}

.volunteer-options__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}

.volunteer-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
  user-select: none;
}

.volunteer-checkbox:hover {
  background: var(--color-primary-ghost);
}

.volunteer-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.volunteer-checkbox__label {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.3;
}

/* ── PayPal Buttons Area ─────────────────────────────────────── */
.paypal-section {
  text-align: center;
}

.paypal-section__summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary-faded);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(46, 89, 153, 0.12);
}

.paypal-section__summary-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.paypal-section__summary-amount {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

#paypal-button-container {
  min-height: 55px;
  transition: opacity var(--duration-normal) var(--ease-out);
}

#paypal-button-container.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.paypal-section__note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

.form-incomplete-msg {
  padding: var(--space-md);
  background: var(--color-error-bg);
  border: 1px solid rgba(197, 48, 48, 0.15);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-error);
  margin-bottom: var(--space-md);
  display: none;
  align-items: center;
  gap: var(--space-sm);
}

.form-incomplete-msg.visible {
  display: flex;
}

/* ── Confirmation Screen ─────────────────────────────────────── */
.confirmation {
  display: none;
  text-align: center;
  animation: fadeInUp var(--duration-slow) var(--ease-out);
}

.confirmation.visible {
  display: block;
}

.confirmation__icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
  animation: popIn 0.5s var(--ease-out);
}

.confirmation__title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-sm);
}

.confirmation__message {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.confirmation__details {
  text-align: left;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.confirmation__detail-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.9rem;
}

.confirmation__detail-row:last-child {
  border-bottom: none;
}

.confirmation__detail-label {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.confirmation__detail-value {
  color: var(--color-text);
  font-weight: 600;
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

.confirmation__print-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--duration-normal) var(--ease-out);
}

.confirmation__print-btn:hover {
  background: var(--color-primary-dark);
}

/* ── Loading Overlay ─────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-overlay.visible {
  display: flex;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Footer ──────────────────────────────────────────────────── */
.checkout-footer {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.checkout-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.checkout-footer a:hover {
  text-decoration: underline;
}

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popIn {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  60% {
    transform: scale(1.15);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(46, 89, 153, 0.2); }
  50% { box-shadow: 0 0 0 8px rgba(46, 89, 153, 0); }
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .checkout-container {
    padding: var(--space-lg) var(--space-sm) var(--space-xl);
  }

  .section-card {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

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

  .volunteer-options__grid {
    grid-template-columns: 1fr;
  }

  .tier-card {
    padding: var(--space-sm) var(--space-md);
  }

  .tier-card__price {
    font-size: 1.1rem;
  }

  .paypal-section__summary {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .confirmation__detail-row {
    flex-direction: column;
    gap: 2px;
  }

  .confirmation__detail-value {
    text-align: left;
    max-width: 100%;
  }
}

/* ── Print Styles ────────────────────────────────────────────── */
@media print {
  body::before,
  body::after {
    display: none;
  }

  body {
    background: white;
  }

  .section-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .checkout-header {
    color: var(--color-text);
  }

  #paypal-button-container,
  .confirmation__print-btn {
    display: none !important;
  }
}