/* Visual surfaces only: retain the shared layout, theme controls and workflows. */
body {
  --arena-cool: rgba(83, 171, 220, .12);
  --arena-warm: rgba(240, 160, 80, .13);
  --arena-edge: rgba(146, 177, 208, .23);
  --arena-panel: linear-gradient(135deg, rgba(30, 42, 57, .96), rgba(13, 21, 33, .98));
  --arena-inset: linear-gradient(145deg, #1a2636, #101925);
  --arena-shadow: 0 12px 32px rgba(0, 0, 0, .22), inset 0 1px 0 rgba(255, 255, 255, .045);
  --arena-texture: url('images/tactical-grid.svg');
}

body:not(.theme-light) {
  background-image:
    radial-gradient(ellipse at 7% 15%, var(--arena-warm), transparent 42%),
    radial-gradient(ellipse at 95% 32%, var(--arena-cool), transparent 45%),
    linear-gradient(180deg, rgba(5, 11, 20, .38), rgba(5, 11, 20, .88)),
    url('bg.webp');
  background-position: center;
  background-size: cover;
}

body .main-menu {
  background: linear-gradient(180deg, transparent, var(--bg) 96%);
}

body .top-bar {
  background: linear-gradient(110deg, var(--header-bg), var(--header-bg));
  border-bottom-color: var(--arena-edge);
  box-shadow: 0 1px 0 var(--arena-warm), 0 8px 28px var(--header-shadow-color);
  backdrop-filter: blur(18px);
}

body .home-hero {
  isolation: isolate;
  border-color: var(--arena-edge);
  background:
    linear-gradient(90deg, rgba(12, 20, 31, .98) 8%, rgba(12, 20, 31, .86) 49%, rgba(12, 20, 31, .24)),
    radial-gradient(ellipse at 84% 30%, rgba(72, 142, 183, .24), transparent 62%),
    url('bg.webp') center 64% / cover;
  box-shadow: 0 24px 64px rgba(0, 0, 0, .3), inset 0 1px 0 rgba(255, 255, 255, .08);
}

body .home-hero::before {
  width: 112px;
  background: linear-gradient(90deg, var(--accent), #ffe1a8, transparent);
  box-shadow: 0 0 24px var(--accent-glow);
}

body .home-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: var(--arena-texture) right center / auto 100% no-repeat;
  opacity: .7;
}

body .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent);
}

body .hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

body .hero-panel {
  background: linear-gradient(145deg, rgba(30, 45, 62, .88), rgba(11, 20, 31, .94));
  border-color: var(--arena-edge);
  box-shadow: var(--arena-shadow);
  backdrop-filter: blur(8px);
}

body .hero-panel li > span {
  background: var(--arena-inset);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
}

body .main-menu .service-card,
body .main-menu .quick-card {
  position: relative;
  isolation: isolate;
  background: var(--arena-panel);
  border-color: var(--arena-edge);
  box-shadow: var(--arena-shadow);
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}

body .main-menu .service-card::before,
body .main-menu .quick-card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 100% 0, var(--arena-cool), transparent 68%),
    var(--arena-texture) right center / auto 230% no-repeat;
}

body .main-menu .service-card::after,
body .main-menu .quick-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  pointer-events: none;
}

body .main-menu .service-card-primary,
body .main-menu .service-card-primary:hover {
  background: linear-gradient(115deg, rgba(62, 43, 29, .98), rgba(25, 30, 39, .98) 65%);
  border-color: rgba(240, 160, 80, .45);
}

body .main-menu .service-card:hover,
body .main-menu .quick-card:hover {
  background: var(--arena-panel);
  border-color: var(--accent);
  box-shadow: 0 14px 36px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, .08);
}

body .service-card .menu-icon {
  border: 1px solid var(--accent-border);
  background: linear-gradient(145deg, var(--accent-soft), var(--surface-inset));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08), 0 4px 16px rgba(0, 0, 0, .12);
}

body .card,
body .rental-account-card,
body .oc-card,
body .tp-order-card,
body .news-item,
body .content-item-card {
  background:
    radial-gradient(ellipse at 100% 0, var(--arena-cool), transparent 60%),
    var(--arena-texture) right top / 360px auto no-repeat,
    var(--arena-panel);
  border-color: var(--arena-edge);
  box-shadow: var(--arena-shadow);
}

body .card:hover { box-shadow: var(--arena-shadow); }
body .card-header { border-bottom: 1px solid var(--arena-edge); padding-bottom: 14px; }
body .card-num { border: 1px solid var(--accent-border); border-radius: 9px; }

body .card-inner,
body .detail-inner,
body .player-inner {
  background: var(--arena-inset);
  border-color: var(--arena-edge);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .035);
}

body .project-card input:checked + .card-inner,
body .detail-card input:checked + .detail-inner,
body .player-card input:checked + .player-inner {
  background: linear-gradient(145deg, var(--accent-soft), var(--surface-inset));
  border-color: var(--accent);
  box-shadow: inset 0 0 24px var(--accent-soft), 0 0 14px var(--accent-glow);
}

body .price-box,
body .calc-result {
  background: linear-gradient(125deg, var(--accent-soft), var(--surface-inset) 75%);
  border-color: var(--accent-border);
}

body:not(.theme-light) .hero-panel li small,
body:not(.theme-light) .service-copy small,
body:not(.theme-light) .quick-card small,
body:not(.theme-light) .card-desc { color: #a4b2c4; }

/* Light mode uses the same tactical details with pale metal surfaces. */
body.theme-light {
  --arena-cool: rgba(55, 117, 198, .055);
  --arena-warm: rgba(40, 89, 207, .08);
  --arena-edge: #d4deed;
  --arena-panel: linear-gradient(135deg, #fff, #f0f4fb);
  --arena-inset: linear-gradient(145deg, #fff, #eef3fa);
  --arena-shadow: 0 8px 26px rgba(24, 36, 59, .055), inset 0 1px 0 #fff;
}

body.theme-light .home-hero {
  background:
    radial-gradient(ellipse at 96% 10%, rgba(40, 89, 207, .1), transparent 58%),
    linear-gradient(110deg, #fff, #edf3fc);
  box-shadow: var(--arena-shadow);
}

body.theme-light .hero-panel { background: var(--arena-panel); }
body.theme-light .main-menu .service-card-primary,
body.theme-light .main-menu .service-card-primary:hover {
  background: linear-gradient(115deg, #eaf1ff, #fff);
  border-color: var(--accent-border);
}

@media (max-width: 700px) {
  body:not(.theme-light) { background-attachment: scroll; }
  body .home-hero::after { opacity: .4; }
  body .card, body .rental-account-card, body .oc-card { background-size: auto, 250px auto, auto; }
}

@media (prefers-reduced-motion: reduce) {
  body .main-menu .service-card,
  body .main-menu .quick-card { transition: none; }
  body .main-menu .service-card:hover,
  body .main-menu .quick-card:hover { transform: none; }
}