/* Dark is the default theme; [data-theme="light"] on <html> switches to light. */
:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --surface: #141821;
  --surface-raised: #1b2030;
  --text: #e8ebf2;
  --muted: #8b93a7;
  --border: #262c3a;
  --accent: #4f8cff;
  --accent-hover: #6ea0ff;
  --accent-contrast: #06101f;
  --accent-soft: rgba(79, 140, 255, .14);
  --glow: 0 0 0 1px rgba(79, 140, 255, .35), 0 8px 28px rgba(79, 140, 255, .18);
  --header-bg: rgba(11, 13, 18, .72);
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  --danger: #ff6b6b;
  --danger-bg: rgba(255, 107, 107, .12);
  --warning-text: #ffc266;
  --warning-bg: rgba(255, 181, 71, .12);
  --success: #4ade9b;
  --success-bg: rgba(74, 222, 155, .12);
  --radius: 12px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-raised: #f0f2f7;
  --text: #14171f;
  --muted: #5d6577;
  --border: #e2e5ee;
  --accent: #2f6fec;
  --accent-hover: #1f5bd6;
  --accent-contrast: #ffffff;
  --accent-soft: rgba(47, 111, 236, .1);
  --glow: 0 0 0 1px rgba(47, 111, 236, .3), 0 8px 24px rgba(20, 23, 31, .08);
  --header-bg: rgba(255, 255, 255, .8);
  --shadow: 0 1px 2px rgba(20, 23, 31, .06);
  --danger: #b42318;
  --danger-bg: #fdecea;
  --warning-text: #8a4b00;
  --warning-bg: #fff4e5;
  --success: #0b6e4f;
  --success-bg: #e8f5ee;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; -webkit-font-smoothing: antialiased; }
body, .site-header, .card, .table, .summary, .panel, .chip, input, textarea, select, .button { transition: background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1 { font-size: 1.6rem; margin: 1rem 0; letter-spacing: -.01em; }
h2 { font-size: 1.2rem; }
img { max-width: 100%; height: auto; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px 48px; }
.muted { color: var(--muted); font-size: .9rem; }
.negative { color: var(--danger); font-weight: 600; }

.site-header { position: sticky; top: 0; z-index: 10; background: var(--header-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.brand { font-weight: 700; font-size: 1.25rem; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }
.brand { display: inline-flex; align-items: center; gap: .35em; }
.brand__mark { width: 1.3em; height: 1.3em; color: var(--accent); filter: drop-shadow(0 0 6px var(--accent-soft)) drop-shadow(0 0 10px var(--accent-soft)); }
.site-nav { display: flex; gap: 1rem; align-items: center; }
.site-nav form { margin: 0; }
.site-nav a { color: var(--text); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }
.pill { background: var(--accent); color: var(--accent-contrast); border-radius: 999px; padding: 0 .5rem; font-size: .8rem; font-weight: 700; }

.theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 2.25rem; height: 2.25rem; padding: 0; border: 1px solid var(--border); border-radius: 50%; background: var(--surface); color: var(--text); cursor: pointer; }
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle svg { width: 1.1rem; height: 1.1rem; }
.theme-toggle__sun { display: none; }
:root[data-theme="light"] .theme-toggle__sun { display: block; }
:root[data-theme="light"] .theme-toggle__moon { display: none; }

.flash { padding: .75rem 1rem; border-radius: var(--radius); margin: 1rem 0; background: var(--success-bg); color: var(--success); border: 1px solid transparent; }
.flash--alert { background: var(--danger-bg); color: var(--danger); }
.flash ul { margin: 0; padding-left: 1.2rem; }

.button, input[type=submit].button, button.button { display: inline-block; background: var(--accent); color: var(--accent-contrast); border: 0; border-radius: var(--radius); padding: .65rem 1.1rem; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.button:hover, .button:focus-visible { background: var(--accent-hover); color: var(--accent-contrast); box-shadow: var(--glow); }
.button--secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.button--secondary:hover { background: var(--surface-raised); color: var(--text); }
.button--danger { background: var(--danger); color: #fff; }
.button--danger:hover { background: var(--danger); color: #fff; box-shadow: none; filter: brightness(1.1); }
.link-button { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }

input[type=text], input[type=email], input[type=tel], input[type=number], input[type=password], input[type=search], textarea, select { padding: .6rem .8rem; border: 1px solid var(--border); border-radius: var(--radius); font: inherit; background: var(--surface); color: var(--text); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
::placeholder { color: var(--muted); }
input[type=radio], input[type=checkbox] { accent-color: var(--accent); }

.toolbar { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.search input { padding: .55rem .8rem; min-width: 240px; }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin: .5rem 0; }
.chip { padding: .3rem .8rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text); text-decoration: none; font-size: .9rem; }
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip--active, .chip--active:hover { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; color: var(--text); text-decoration: none; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.card:hover { color: var(--text); transform: translateY(-2px); border-color: transparent; box-shadow: var(--glow); }
.card__image { aspect-ratio: 3 / 4; background: var(--surface-raised); display: flex; align-items: center; justify-content: center; }
.card__image img { width: 100%; height: 100%; object-fit: contain; }
.card__image--empty { background: radial-gradient(circle at 50% 35%, var(--accent-soft), var(--surface-raised) 70%); color: var(--muted); }
.card__image--empty svg { width: 30%; height: auto; opacity: .6; }
.card__body { padding: .75rem 1rem 1rem; }
.card__title { font-weight: 600; }
.price { font-weight: 700; }
.card .price { color: var(--accent); }
.price--large { font-size: 1.5rem; margin: .25rem 0; color: var(--accent); }

.product { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.product__gallery { display: grid; gap: .5rem; }
.product__gallery img { border-radius: var(--radius); }
.product__gallery .card__image { border-radius: var(--radius); }
.product__info form { display: flex; gap: .5rem; margin: 1rem 0; }
.qty { width: 4.5rem; padding: .5rem; }

.table { width: 100%; border-collapse: separate; border-spacing: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin: 1rem 0; overflow: hidden; }
.table th, .table td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.table thead th { background: var(--surface-raised); color: var(--muted); font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.table tbody tr:hover { background: var(--accent-soft); }
.table tfoot th { border-bottom: 0; }
.inline { display: inline; }
.actions { display: flex; justify-content: space-between; align-items: center; }

.form { display: flex; flex-direction: column; gap: .35rem; max-width: 520px; }
.form label { font-weight: 600; margin-top: .5rem; }
.form fieldset { border: 1px solid var(--border); border-radius: var(--radius); margin: 1rem 0; }
.form legend { color: var(--muted); padding: 0 .3rem; }
.form .radio { font-weight: 400; display: flex; gap: .5rem; align-items: baseline; }
.form input[type=submit] { margin-top: 1rem; align-self: flex-start; }

.auth { max-width: 420px; margin: 3rem auto; }
.auth h1 { margin-top: 0; }
.auth .form { max-width: none; }

.checkout { display: grid; grid-template-columns: 1fr 320px; gap: 2rem; align-items: start; }
.summary, .panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 1rem; box-shadow: var(--shadow); }
.summary { position: sticky; top: 5rem; }
.panel--success { background: var(--success-bg); border-color: transparent; }
.summary__row { display: flex; justify-content: space-between; gap: 1rem; padding: .3rem 0; }
.summary__total { border-top: 1px solid var(--border); font-weight: 700; margin-top: .5rem; padding-top: .6rem; }
.instructions dt { font-weight: 600; margin-top: .5rem; }
.instructions dd { margin: 0; }
.columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.badge { font-size: .75rem; font-weight: 600; padding: .15rem .55rem; border-radius: 999px; vertical-align: middle; background: var(--surface-raised); color: var(--muted); }
.badge--paid, .badge--succeeded, .badge--fulfilled { background: var(--success-bg); color: var(--success); }
.badge--awaiting-verification, .badge--pending-payment, .badge--pending { background: var(--warning-bg); color: var(--warning-text); }
.badge--cancelled, .badge--failed, .badge--rejected { background: var(--danger-bg); color: var(--danger); }

@media (max-width: 720px) {
  .product, .checkout, .columns { grid-template-columns: 1fr; }
  .summary { position: static; }
  .table { display: block; overflow-x: auto; }
  .search input { min-width: 0; width: 100%; }
  .search { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .card:hover { transform: none; }
}