/* ── Reset & Variables ─────────────────────────────────────── */

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

:root {
  --bg: #f6f4f0;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --border: #e4e0d8;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.12);
  --transition: .35s cubic-bezier(.4,0,.2,1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  color-scheme: light;
}

/* Dark theme — applied when user picks "dark" or OS prefers dark in auto mode */
:root[data-theme="dark"],
:root[data-theme="auto"][data-system="dark"] {
  --bg: #0c0e14;
  --surface: #181b24;
  --text: rgba(255,255,255,.92);
  --text-muted: rgba(255,255,255,.55);
  --border: rgba(255,255,255,.10);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.55);
  color-scheme: dark;
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ───────────────────────────────────────────────── */

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Cause Banner ─────────────────────────────────────────── */

.cause-banner {
  background: linear-gradient(135deg, #0057b8 0%, #0057b8 50%, #ffd700 50%, #ffd700 100%);
  padding: 12px 0;
  position: relative;
}

.cause-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.55);
}

.cause-banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.cause-emblem {
  width: 32px;
  height: 38px;
  flex-shrink: 0;
}

.cause-text {
  font-size: .82rem;
  color: rgba(255,255,255,.92);
  line-height: 1.4;
}

.cause-text strong {
  color: #ffd700;
}

.cause-counter {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 600;
  color: #ffd700;
  background: rgba(255,255,255,.12);
  padding: 3px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

/* ── Header ───────────────────────────────────────────────── */

.site-header {
  padding: 48px 0 24px;
  text-align: center;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.btn-theme {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: .78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s ease;
}

.btn-theme:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.btn-theme-icon {
  font-size: 1rem;
  line-height: 1;
}

.logo {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--text);
}

.logo-dot {
  color: #c28b0a;
}

.tagline {
  margin-top: 6px;
  font-size: .95rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: .02em;
}

/* ── Kits Grid ────────────────────────────────────────────── */

.kits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 32px 0 64px;
  align-items: start;
}

@media (max-width: 720px) {
  .kits-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* ── Kit Card ─────────────────────────────────────────────── */

.kit-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
  position: relative;
}

.kit-card:hover:not(.expanded) {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--kit-accent, var(--border));
}

.kit-card.expanded {
  cursor: default;
  border-color: var(--kit-accent, var(--border));
  box-shadow: var(--shadow-lg);
}

/* ── Bag Visual (collapsed) ───────────────────────────────── */

.kit-bag {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px 32px;
  position: relative;
  transition: padding var(--transition);
}

.expanded .kit-bag {
  flex-direction: row;
  padding: 24px 28px 20px;
  gap: 20px;
  border-bottom: 1.5px solid var(--border);
  cursor: pointer;
}

.kit-bag-svg {
  width: 160px;
  height: 220px;
  color: var(--kit-accent, #999);
  transition: all var(--transition);
  flex-shrink: 0;
}

.expanded .kit-bag-svg {
  width: 72px;
  height: 100px;
}

.kit-bag-svg .grip-left,
.kit-bag-svg .grip-right {
  transition: transform var(--transition);
}

.expanded .kit-bag-svg .grip-left {
  transform: rotate(-12deg);
  transform-origin: 90px 45px;
}

.expanded .kit-bag-svg .grip-right {
  transform: rotate(12deg);
  transform-origin: 130px 45px;
}

.expanded .kit-bag-svg .zip-teeth {
  opacity: .3;
}

.kit-info {
  text-align: center;
  transition: all var(--transition);
}

.expanded .kit-info {
  text-align: left;
  flex: 1;
}

.kit-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.03em;
  margin-top: 16px;
  transition: all var(--transition);
}

.expanded .kit-name {
  font-size: 1.2rem;
  margin-top: 0;
}

.kit-tagline {
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: .04em;
}

.kit-price {
  font-family: var(--mono);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--kit-accent);
  margin-top: 8px;
  transition: font-size var(--transition);
}

.expanded .kit-price {
  font-size: 1.35rem;
  margin-top: 4px;
}

.kit-cta {
  display: inline-block;
  margin-top: 16px;
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  opacity: .7;
  transition: opacity var(--transition);
}

.expanded .kit-cta {
  display: none;
}

.kit-card:hover:not(.expanded) .kit-cta {
  opacity: 1;
}

/* ── Kit Contents (expanded) ──────────────────────────────── */

.kit-contents {
  max-height: 0;
  overflow: hidden;
  transition: max-height .5s cubic-bezier(.4,0,.2,1);
}

.expanded .kit-contents {
  max-height: 1200px;
}

.kit-items {
  padding: 12px 16px 20px;
}

/* ── Kit Item ─────────────────────────────────────────────── */

.kit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition:
    background var(--transition),
    opacity var(--transition);
  opacity: 0;
  transform: translateY(8px);
}

.expanded .kit-item {
  opacity: 1;
  transform: translateY(0);
}

.kit-item:hover {
  background: color-mix(in srgb, var(--text) 4%, transparent);
}

.kit-item.deselected {
  opacity: .35;
}

.kit-item.deselected:hover {
  opacity: .55;
}

/* stagger animation */
.expanded .kit-item:nth-child(1)  { transition-delay: .05s; }
.expanded .kit-item:nth-child(2)  { transition-delay: .08s; }
.expanded .kit-item:nth-child(3)  { transition-delay: .11s; }
.expanded .kit-item:nth-child(4)  { transition-delay: .14s; }
.expanded .kit-item:nth-child(5)  { transition-delay: .17s; }
.expanded .kit-item:nth-child(6)  { transition-delay: .20s; }
.expanded .kit-item:nth-child(7)  { transition-delay: .23s; }
.expanded .kit-item:nth-child(8)  { transition-delay: .26s; }
.expanded .kit-item:nth-child(9)  { transition-delay: .29s; }
.expanded .kit-item:nth-child(10) { transition-delay: .32s; }

/* ── Checkbox ─────────────────────────────────────────────── */

.item-check {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  cursor: pointer;
}

.item-check input {
  position: absolute;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 1;
  margin: 0;
  opacity: 0.001;
}

.item-check .check-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
  background: var(--surface);
}

.item-check input:checked ~ .check-box {
  background: var(--kit-accent);
  border-color: var(--kit-accent);
}

.item-check .check-box svg {
  width: 12px;
  height: 12px;
  color: white;
  opacity: 0;
  transform: scale(.5);
  transition: all .2s ease;
}

.item-check input:checked ~ .check-box svg {
  opacity: 1;
  transform: scale(1);
}

/* ── Item Icon ────────────────────────────────────────────── */

.item-icon {
  width: 36px;
  height: 48px;
  flex-shrink: 0;
  color: var(--kit-accent, #888);
  opacity: .8;
  display: flex;
  align-items: center;
  justify-content: center;
}

.item-icon svg {
  width: 100%;
  height: 100%;
}

.item-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ── Item Info ─────────────────────────────────────────────── */

.item-info {
  flex: 1;
  min-width: 0;
}

.item-name {
  font-size: .9rem;
  font-weight: 600;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-dose {
  font-size: .75rem;
  font-family: var(--mono);
  color: var(--text-muted);
}

.item-form-tag {
  display: inline-block;
  font-size: .65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 1px 6px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--text) 7%, transparent);
  color: var(--text-muted);
  margin-left: 6px;
}

/* ── Item Price ────────────────────────────────────────────── */

.item-price {
  font-family: var(--mono);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 44px;
  text-align: right;
}

/* ── Blend / Sub-group ────────────────────────────────────── */

.item-components {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

.item-component {
  font-size: .7rem;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--text) 5%, transparent);
  padding: 1px 7px;
  border-radius: 4px;
  font-family: var(--mono);
}

/* ── Separator ────────────────────────────────────────────── */

.kit-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 12px;
  opacity: .5;
}

.kit-separator-label {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  padding: 8px 12px 2px;
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition);
}

.expanded .kit-separator-label {
  opacity: .7;
  transform: translateY(0);
  transition-delay: .22s;
}

/* ── Kit Footer (totals) ──────────────────────────────────── */

.kit-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px 18px;
  border-top: 1.5px solid var(--border);
  opacity: 0;
  transition: opacity var(--transition);
}

.expanded .kit-footer {
  opacity: 1;
  transition-delay: .3s;
}

.kit-selected-count {
  font-size: .8rem;
  color: var(--text-muted);
}

.kit-selected-count strong {
  color: var(--text);
}

.kit-total {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--kit-accent);
}

/* ── Footer ───────────────────────────────────────────────── */

.site-footer {
  margin-top: auto;
  padding: 28px 0 20px;
  text-align: center;
  font-size: .78rem;
  color: var(--text-muted);
}

.cause-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 12px;
  padding: 14px 20px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
}

.cause-footer p {
  font-size: .8rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.cause-footer strong {
  color: #dab44d;
}

.cause-emblem-sm {
  width: 24px;
  height: 30px;
  flex-shrink: 0;
}

.footer-legal {
  opacity: .5;
  margin-top: 4px;
}

/* ── Success Page ─────────────────────────────────────────── */

.success-card {
  max-width: 480px;
  margin: 64px auto;
  padding: 48px 32px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.success-icon { margin-bottom: 20px; }

.success-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.success-body {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.success-back {
  display: inline-block;
  padding: 10px 28px;
  border-radius: 8px;
  background: #c28b0a;
  color: #fff;
  font-weight: 600;
  font-size: .9rem;
  text-decoration: none;
  transition: opacity .2s;
}

.success-back:hover { opacity: .85; }

/* ── Checkout Button ──────────────────────────────────────── */

.btn-checkout {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  border: none;
  border-radius: 8px;
  background: var(--kit-accent);
  color: #fff;
  font-family: var(--font);
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .2s, transform .15s;
}

.btn-checkout:hover { opacity: .88; transform: translateY(-1px); }
.btn-checkout:active { transform: translateY(0); }

.btn-checkout:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.btn-checkout svg {
  width: 16px;
  height: 16px;
}

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

@media (max-width: 720px) {
  .cause-banner-inner { gap: 8px; text-align: center; }
  .cause-text { font-size: .75rem; }
  .cause-counter { font-size: .7rem; }
  .cause-footer { flex-direction: column; gap: 6px; padding: 10px 14px; }

  .site-header { padding: 32px 0 16px; }
  .logo { font-size: 1.6rem; }
  .btn-theme { right: 16px; padding: 6px 10px; font-size: .72rem; }
  .btn-theme #themeLabel { display: none; }

  .kit-bag { padding: 28px 16px 24px; }
  .kit-bag-svg { width: 120px; height: 166px; }
  .expanded .kit-bag-svg { width: 56px; height: 78px; }
  .kit-name { font-size: 1.25rem; }
  .kit-price { font-size: 1.5rem; }

  .kit-items { padding: 8px 8px 16px; }
  .kit-item { gap: 8px; padding: 8px; }
  .item-icon { width: 28px; height: 38px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .expanded .kit-bag { flex-direction: column; align-items: flex-start; }
}