/* ============================================================
   IBM Carbon Design System — Gray 100 Dark Theme
   Matthew Churchill Ltd
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@300;400;600&display=swap');

:root {
    --background:          #161616;
    --background-hover:    #1f1f1f;
    --layer-01:            #262626;
    --layer-02:            #393939;
    --layer-03:            #525252;

    --text-primary:        #f4f4f4;
    --text-secondary:      #c6c6c6;
    --text-tertiary:       #8d8d8d;
    --text-disabled:       #525252;
    --text-on-color:       #ffffff;

    --border-subtle:       #393939;
    --border-strong:       #525252;
    --border-interactive:  #0f62fe;

    --interactive:         #0f62fe;
    --interactive-hover:   #0353e9;
    --interactive-active:  #002d9c;

    --link:                #78a9ff;
    --link-hover:          #a6c8ff;

    --error:               #ff8389;
    --success:             #42be65;
    --warning:             #f1c21b;
    --info:                #82cfff;

    --font-sans:  'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
    --font-mono:  'IBM Plex Mono', 'Menlo', 'Courier New', monospace;

    --sp-01: 2px;  --sp-02: 4px;  --sp-03: 8px;  --sp-04: 12px;
    --sp-05: 16px; --sp-06: 24px; --sp-07: 32px; --sp-08: 48px;
    --sp-09: 64px; --sp-10: 80px; --sp-11: 96px; --sp-12: 160px;

    --max-width: 1440px;
    --gutter: 32px;
}

/* ── Reset ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body { background: var(--background); color: var(--text-primary); font-family: var(--font-sans); line-height: 1.5; min-height: 100vh; display: flex; flex-direction: column; }
img { max-width: 100%; display: block; }
video { width: 100%; border-radius: 0; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }
ul { list-style: none; }

/* ── Typography ─────────────────────────────────── */
h1 { font-size: 3.75rem; font-weight: 300; line-height: 1.17; }
h2 { font-size: 2rem;    font-weight: 400; line-height: 1.25; }
h3 { font-size: 1.5rem;  font-weight: 400; line-height: 1.33; }
h4 { font-size: 1.25rem; font-weight: 600; line-height: 1.4;  }
h5 { font-size: 1rem;    font-weight: 600; line-height: 1.5;  }
p  { color: var(--text-secondary); line-height: 1.6; margin-bottom: var(--sp-05); }
p:last-child { margin-bottom: 0; }

.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--interactive);
    display: block;
    margin-bottom: var(--sp-04);
}

/* ── Layout ─────────────────────────────────────── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--sp-10) 0; }
.section--sm { padding: var(--sp-08) 0; }
.section--lg { padding: var(--sp-11) 0; }
main { flex: 1; }

/* ── Navigation ─────────────────────────────────── */
.nav {
    background: var(--background);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky; top: 0; z-index: 100;
    height: 48px; display: flex; align-items: center;
}
.nav__inner {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gutter);
}
.nav__brand {
    font-size: 0.8125rem; font-weight: 600; color: var(--text-primary);
    text-decoration: none; text-transform: uppercase; letter-spacing: 0.05em;
}
.nav__brand:hover { color: var(--text-primary); text-decoration: none; }
.nav__links { display: flex; gap: var(--sp-06); align-items: center; }
.nav__links a { font-size: 0.875rem; color: var(--text-secondary); text-decoration: none; transition: color 0.1s; }
.nav__links a:hover { color: var(--text-primary); text-decoration: none; }

/* Basket icon in nav */
.basket-nav-link { position: relative; display: flex; align-items: center; color: var(--text-secondary); }
.basket-nav-link:hover { color: var(--text-primary); }
#basket-badge {
    position: absolute; top: -8px; right: -10px;
    background: var(--interactive); color: #fff;
    font-size: 0.625rem; font-weight: 600; font-family: var(--font-mono);
    min-width: 16px; height: 16px; border-radius: 8px;
    align-items: center; justify-content: center; padding: 0 3px;
}

/* Add-to-basket toast */
.basket-toast {
    position: fixed; bottom: 32px; right: 32px; z-index: 9999;
    background: var(--layer-02); border: 1px solid var(--interactive);
    color: var(--text-primary); font-size: 0.875rem;
    padding: 12px 24px; opacity: 0; transform: translateY(8px);
    transition: opacity 0.2s, transform 0.2s; pointer-events: none;
}
.basket-toast--visible { opacity: 1; transform: translateY(0); }
.nav__cta {
    background: var(--interactive); color: var(--text-on-color) !important;
    padding: 8px 16px; font-size: 0.875rem; font-weight: 400;
    text-decoration: none !important; transition: background 0.1s;
}
.nav__cta:hover { background: var(--interactive-hover) !important; }

/* ── Buttons ─────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 13px 24px; font-family: var(--font-sans);
    font-size: 0.875rem; font-weight: 400; border: none;
    border-radius: 0; cursor: pointer; text-decoration: none;
    transition: background 0.1s, color 0.1s, border-color 0.1s;
    line-height: 1; white-space: nowrap;
}
.btn--primary   { background: var(--interactive); color: var(--text-on-color); }
.btn--primary:hover { background: var(--interactive-hover); color: var(--text-on-color); text-decoration: none; }
.btn--secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--text-primary); }
.btn--secondary:hover { background: var(--text-primary); color: var(--background); text-decoration: none; }
.btn--ghost     { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-subtle); }
.btn--ghost:hover { background: var(--layer-01); color: var(--text-primary); border-color: var(--text-secondary); text-decoration: none; }
.btn--danger    { background: #da1e28; color: #fff; }
.btn--danger:hover { background: #ba1b23; }
.btn--full      { width: 100%; justify-content: center; }
.btn--sm        { padding: 8px 16px; font-size: 0.8125rem; }
button.btn { font-family: var(--font-sans); }

/* ── Cards ───────────────────────────────────────── */
.card { background: var(--layer-01); border: 1px solid var(--border-subtle); padding: var(--sp-06); }
.card--raised { background: var(--layer-02); }

/* ── Product grid & cards ────────────────────────── */
.product-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border-subtle); border: 1px solid var(--border-subtle);
}
.product-card {
    background: var(--layer-01); padding: var(--sp-07);
    display: flex; flex-direction: column; gap: var(--sp-04);
    transition: background 0.1s; text-decoration: none; color: inherit;
}
.product-card:hover { background: var(--background-hover); text-decoration: none; color: inherit; }
.product-card__tag { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); }
.product-card__name { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); line-height: 1.3; }
.product-card__desc { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.5; flex-grow: 1; margin: 0; }
.product-card__price { font-size: 2rem; font-weight: 300; color: var(--text-primary); line-height: 1; margin-top: var(--sp-03); }
.product-card__price-note { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.04em; margin-top: 4px; }
.product-card__cta { margin-top: var(--sp-04); }

/* ── Specs table ─────────────────────────────────── */
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--border-subtle); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td { padding: 11px 0; font-size: 0.875rem; }
.specs-table td:first-child { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-tertiary); width: 40%; }
.specs-table td:last-child { color: var(--text-primary); font-weight: 400; }

/* ── Forms ───────────────────────────────────────── */
.form-group { margin-bottom: var(--sp-05); }
.form-label { display: block; font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-secondary); margin-bottom: 8px; }
.form-input, .form-select, .form-textarea {
    width: 100%; background: var(--layer-01); color: var(--text-primary);
    font-family: var(--font-sans); font-size: 0.875rem; padding: 12px 16px;
    border: none; border-bottom: 1px solid var(--border-strong); outline: none;
    transition: border-color 0.1s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-bottom-color: var(--interactive);
    outline: 2px solid var(--interactive); outline-offset: -2px;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-tertiary); }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23c6c6c6' d='M8 11L3 6h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; cursor: pointer; }
.form-textarea { border: 1px solid var(--border-strong); resize: vertical; min-height: 120px; }
.form-textarea:focus { border-color: var(--interactive); }
.form-helper { font-size: 0.75rem; color: var(--text-tertiary); margin-top: 4px; }
.form-error  { font-size: 0.75rem; color: var(--error); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-05); }

/* ── Hero ────────────────────────────────────────── */
.hero { padding: var(--sp-12) 0; border-bottom: 1px solid var(--border-subtle); }
.hero__title { font-size: 3.75rem; font-weight: 300; line-height: 1.17; max-width: 760px; margin-bottom: var(--sp-06); }
.hero__subtitle { font-size: 1.125rem; font-weight: 300; color: var(--text-secondary); line-height: 1.6; max-width: 560px; margin-bottom: var(--sp-07); }
.hero__actions { display: flex; gap: var(--sp-04); flex-wrap: wrap; }

/* ── Split checkout ──────────────────────────────── */
.checkout-grid { display: grid; grid-template-columns: 1fr 1fr; min-height: calc(100vh - 48px); }
.checkout-left  { padding: var(--sp-08) var(--sp-08); border-right: 1px solid var(--border-subtle); }
.checkout-right { padding: var(--sp-08) var(--sp-08); background: var(--layer-01); }
.checkout-section-title { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); margin-bottom: var(--sp-05); display: block; border-bottom: 1px solid var(--border-subtle); padding-bottom: var(--sp-03); }

.order-summary { border-left: 2px solid var(--interactive); padding-left: var(--sp-05); margin-bottom: var(--sp-07); }
.order-summary__name { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.order-summary__meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-tertiary); margin-top: 4px; }
.order-summary__price { font-size: 2rem; font-weight: 300; color: var(--text-primary); margin-top: var(--sp-04); }

.price-breakdown { margin-bottom: var(--sp-06); }
.price-line { display: flex; justify-content: space-between; font-size: 0.875rem; padding: 8px 0; border-bottom: 1px solid var(--border-subtle); }
.price-line:last-child { border-bottom: none; font-weight: 600; color: var(--text-primary); font-size: 1rem; }
.price-line span:first-child { color: var(--text-secondary); }

/* ── Alerts ──────────────────────────────────────── */
.alert { padding: 12px 16px; margin-bottom: var(--sp-05); font-size: 0.875rem; border-left: 3px solid; }
.alert--error   { background: rgba(218,30,40,0.1); border-color: var(--error); color: var(--error); }
.alert--success { background: rgba(66,190,101,0.1); border-color: var(--success); color: var(--success); }
.alert--info    { background: rgba(15,98,254,0.1); border-color: var(--interactive); color: var(--link); }
.alert--warning { background: rgba(241,194,27,0.1); border-color: var(--warning); color: var(--warning); }

/* ── Data tables ─────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-tertiary); padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border-subtle); white-space: nowrap; }
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-subtle); color: var(--text-secondary); }
.data-table tr:hover td { background: var(--layer-01); }
.data-table td a { color: var(--link); }

/* ── Badges ──────────────────────────────────────── */
.badge { font-family: var(--font-mono); font-size: 0.625rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 8px; display: inline-block; }
.badge--pending  { background: rgba(241,194,27,0.15); color: var(--warning); }
.badge--paid     { background: rgba(66,190,101,0.15); color: var(--success); }
.badge--shipped  { background: rgba(15,98,254,0.15); color: var(--link); }
.badge--cancelled{ background: rgba(218,30,40,0.15); color: var(--error); }
.badge--refunded { background: rgba(141,141,141,0.15); color: var(--text-tertiary); }
.badge--new      { background: rgba(15,98,254,0.15); color: var(--link); }

/* ── Admin sidebar ───────────────────────────────── */
.admin-layout { display: grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 48px); }
.admin-sidebar { background: var(--layer-01); border-right: 1px solid var(--border-subtle); padding: var(--sp-06) 0; }
.admin-sidebar__heading { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); padding: 0 var(--sp-06) var(--sp-04); }
.admin-sidebar__link { display: block; padding: 10px var(--sp-06); font-size: 0.875rem; color: var(--text-secondary); text-decoration: none; transition: background 0.1s, color 0.1s; }
.admin-sidebar__link:hover, .admin-sidebar__link--active { background: var(--layer-02); color: var(--text-primary); text-decoration: none; }
.admin-sidebar__link--active { border-left: 2px solid var(--interactive); }
.admin-content { padding: var(--sp-07); }
.admin-content h1 { font-size: 1.75rem; margin-bottom: var(--sp-06); }

/* ── Footer ──────────────────────────────────────── */
.footer { background: var(--background); border-top: 1px solid var(--border-subtle); padding: var(--sp-08) 0 var(--sp-06); margin-top: auto; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-07); margin-bottom: var(--sp-08); }
.footer__brand { font-size: 0.8125rem; font-weight: 600; color: var(--text-primary); text-transform: uppercase; letter-spacing: 0.05em; display: block; margin-bottom: var(--sp-04); }
.footer__col-title { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); display: block; margin-bottom: var(--sp-04); }
.footer__links { display: flex; flex-direction: column; gap: var(--sp-03); }
.footer__links a { font-size: 0.875rem; color: var(--text-secondary); text-decoration: none; }
.footer__links a:hover { color: var(--text-primary); }
.footer__legal { border-top: 1px solid var(--border-subtle); padding-top: var(--sp-05); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--sp-04); }
.footer__legal-text { font-size: 0.75rem; color: var(--text-tertiary); }

/* ── Cookie banner ───────────────────────────────── */
.cookie-banner { position: fixed; bottom: 0; left: 0; right: 0; background: var(--layer-02); border-top: 1px solid var(--border-subtle); padding: var(--sp-05) var(--gutter); z-index: 200; display: flex; justify-content: space-between; align-items: center; gap: var(--sp-05); }
.cookie-banner p { font-size: 0.875rem; margin: 0; }
.cookie-banner__actions { display: flex; gap: var(--sp-03); flex-shrink: 0; }

/* ── Utility ─────────────────────────────────────── */
.mono { font-family: var(--font-mono); }
.text-secondary { color: var(--text-secondary) !important; }
.text-tertiary  { color: var(--text-tertiary) !important; }
.text-sm   { font-size: 0.875rem; }
.text-xs   { font-size: 0.75rem; }
.text-lg   { font-size: 1.125rem; }
.bold      { font-weight: 600; }
.divider   { border: none; border-top: 1px solid var(--border-subtle); margin: var(--sp-06) 0; }
.mt-1 { margin-top: var(--sp-03); } .mt-2 { margin-top: var(--sp-05); } .mt-3 { margin-top: var(--sp-06); } .mt-4 { margin-top: var(--sp-07); }
.mb-1 { margin-bottom: var(--sp-03); } .mb-2 { margin-bottom: var(--sp-05); } .mb-3 { margin-bottom: var(--sp-06); }
.flex { display: flex; } .flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: var(--sp-03); } .gap-2 { gap: var(--sp-05); } .gap-3 { gap: var(--sp-06); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-06); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-06); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-06); }

/* ── Legal pages ─────────────────────────────────── */
.legal-content { max-width: 760px; }
.legal-content h2 { font-size: 1.25rem; font-weight: 600; margin: var(--sp-07) 0 var(--sp-04); }
.legal-content h3 { font-size: 1rem; font-weight: 600; margin: var(--sp-05) 0 var(--sp-03); color: var(--text-primary); }
.legal-content p, .legal-content li { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.7; }
.legal-content ul { padding-left: var(--sp-06); margin-bottom: var(--sp-05); }
.legal-content ul li { list-style: disc; margin-bottom: var(--sp-02); }
.legal-content .last-updated { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--sp-07); }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 1100px) {
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    h1 { font-size: 2.5rem; }
    .hero__title { font-size: 2.5rem; }
}

@media (max-width: 768px) {
    :root { --gutter: 16px; }
    .nav__links { display: none; }
    .product-grid { grid-template-columns: 1fr; }
    .checkout-grid { grid-template-columns: 1fr; }
    .checkout-left { border-right: none; border-bottom: 1px solid var(--border-subtle); padding: var(--sp-06) var(--gutter); }
    .checkout-right { padding: var(--sp-06) var(--gutter); }
    .footer__grid { grid-template-columns: 1fr; }
    .hero { padding: var(--sp-09) 0; }
    .hero__title { font-size: 2rem; }
    .hero__subtitle { font-size: 1rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { display: none; }
    .cookie-banner { flex-direction: column; }
}