/* =============================================================================
   LUMIN — Service Cards (grid / stack / list)
   Three layout modes for the "What We Do" cards, driven by [data-svc-mode] on
   the .svc wrapper:  grid (default) · stack · list.
   Vanilla CSS/JS only. Animates transform / opacity / filter only — never
   transition-all. Respects prefers-reduced-motion (static cards, no movement).
   ========================================================================== */

/* ------------------------------------------------------ mode controller bar */
.svc__bar {
  display: flex; align-items: center; justify-content: flex-end;
  gap: .75rem; margin: 0 0 1.4rem;
}
.svc__bar-label {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-muted);
}
.svc__modes {
  display: inline-flex; gap: 4px; padding: 4px;
  border: 1px solid var(--line); border-radius: 9px;
  background: rgba(244, 240, 231, 0.03);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}
.svc__mode {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .04em;
  color: var(--ink-soft); background: transparent; border: 0; border-radius: 6px;
  padding: .42rem .85rem; cursor: pointer;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.svc__mode:hover { color: var(--ink); }
.svc__mode[aria-selected="true"] { background: var(--accent); color: #06231f; }
.svc__mode:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* =================================================== shared card refinements */
/* Enhanced dark-glass surface used across all three modes. A touch more opaque
   than the base --surface so stacked cards never bleed through one another. */
.svc .service-card {
  background:
    linear-gradient(180deg, rgba(244, 240, 231, 0.055), rgba(244, 240, 231, 0.018)),
    rgba(18, 17, 14, 0.82);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(244, 240, 231, 0.04) inset,
              0 10px 30px -22px rgba(0, 0, 0, 0.9);
  -webkit-backdrop-filter: blur(7px); backdrop-filter: blur(7px);
}

/* quiet grid texture behind each card's content (architectural / technical) */
.svc .service-card::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(to right,  rgba(244, 240, 231, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244, 240, 231, 0.045) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(120% 120% at 85% 0%, #000 0%, transparent 62%);
          mask-image: radial-gradient(120% 120% at 85% 0%, #000 0%, transparent 62%);
  opacity: .5;
}

/* restrained teal corner bracket (top-right) — replaces the base top line */
.svc .service-card::before {
  content: ""; position: absolute; top: 12px; right: 12px;
  width: 16px; height: 16px;
  border-top: 1.5px solid var(--accent); border-right: 1.5px solid var(--accent);
  opacity: .28; transform: none;
  background: none;
  transition: opacity .3s var(--ease);
}

.svc .service-card__index { transition: color .3s var(--ease); }
.svc .service-card:hover .service-card__index { color: var(--accent); }

/* ====================================================== GRID MODE (default) */
.svc[data-svc-mode="grid"] .service-card {
  transition: transform .4s var(--ease), box-shadow .4s var(--ease),
              border-color .3s var(--ease);
}
.svc[data-svc-mode="grid"] .service-card:hover,
.svc[data-svc-mode="grid"] .service-card:focus-within {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  box-shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.9),
              0 0 0 1px color-mix(in srgb, var(--accent) 26%, transparent),
              0 10px 36px -18px rgba(47, 212, 194, 0.28);   /* controlled teal glow */
}
.svc[data-svc-mode="grid"] .service-card:hover::before,
.svc[data-svc-mode="grid"] .service-card:focus-within::before { opacity: .9; }

/* ============================================================== STACK MODE */
.svc[data-svc-mode="stack"] .card-grid--services {
  display: block; position: relative;
  max-width: 460px; margin-inline: auto;
  height: var(--svc-stack-h, 300px);
  overflow-x: clip;                 /* no horizontal scroll from drag/offset */
  perspective: 1200px;
  --svc-xstep: 12px;                /* per-depth horizontal offset */
  --svc-ystep: 12px;                /* per-depth vertical offset */
}
.svc[data-svc-mode="stack"] .service-card,
.svc[data-svc-measuring] .service-card { padding: 1.7rem 1.6rem 1.8rem; }

.svc[data-svc-mode="stack"] .service-card {
  position: absolute; top: 0; left: 0; margin: 0;
  width: 100%; height: var(--svc-stack-h, 300px);
  display: flex; flex-direction: column;
  transform-origin: 50% 100%;
  /* cap the visible depth so cards past the 4th never extend the layout box
     (prevents mobile shrink-to-fit / horizontal overflow) */
  --d: min(var(--depth, 0), 3);
  transform:
    translateX(calc(var(--d) * var(--svc-xstep, 12px) + var(--drag-x, 0px)))
    translateY(calc(var(--d) * var(--svc-ystep, 12px)))
    rotate(calc(var(--d) * 1deg + var(--drag-rot, 0deg)))
    scale(calc(1 - var(--d) * 0.045));
  opacity: clamp(0, calc(4 - var(--depth, 0)), 1);   /* depth>=4 fades out */
  filter: brightness(calc(1 - var(--d) * 0.1));
  z-index: calc(100 - var(--depth, 0));
  pointer-events: none;
  transition: transform .5s var(--ease), opacity .4s var(--ease),
              filter .4s var(--ease), box-shadow .4s var(--ease);
}
.svc[data-svc-mode="stack"] .service-card[data-svc-active] {
  pointer-events: auto; cursor: grab;
  touch-action: pan-y;            /* vertical page scroll stays native; we own horizontal drag */
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: 0 26px 60px -30px rgba(0, 0, 0, 0.95),
              0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent),
              0 14px 50px -22px rgba(47, 212, 194, 0.22);
}
.svc[data-svc-mode="stack"] .service-card[data-svc-active].is-dragging {
  cursor: grabbing; transition: none;
}
.svc[data-svc-mode="stack"] .service-card .service-card__desc { margin-top: auto; }
.svc[data-svc-mode="stack"] .service-card__title { font-size: 1.35rem; margin-top: 1rem; }

/* measuring pass — natural heights at stack width (JS reads offsetHeight) */
.svc[data-svc-measuring] .card-grid--services {
  display: block; max-width: 460px; margin-inline: auto; height: auto;
}
.svc[data-svc-measuring] .service-card {
  position: static; width: 100%; height: auto;
  transform: none; opacity: 1; filter: none; margin: 0 0 .6rem;
  display: flex; flex-direction: column;
}

/* stack navigation (prev / counter / next) — only visible in stack mode */
.svc__stack-nav { display: none; }
.svc[data-svc-mode="stack"] .svc__stack-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 1.2rem; margin-top: 1.5rem;
}
.svc__nav-btn {
  width: 44px; height: 44px; border-radius: 50%; flex: none;
  display: grid; place-items: center;
  border: 1px solid var(--line); background: rgba(244, 240, 231, 0.04);
  color: var(--ink); font-size: 1.25rem; line-height: 1; cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease),
              background-color .2s var(--ease), transform .15s var(--ease);
}
.svc__nav-btn:hover { border-color: var(--accent); color: var(--accent); }
.svc__nav-btn:active { transform: scale(.93); }
.svc__nav-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.svc__counter {
  font-family: var(--font-mono); font-size: .85rem; letter-spacing: .1em;
  color: var(--ink-soft); min-width: 6ch; text-align: center;
}
.svc__counter [data-svc-current] { color: var(--accent); }
.svc__counter-sep { margin: 0 .45rem; color: var(--ink-muted); }

/* =============================================================== LIST MODE */
.svc[data-svc-mode="list"] .card-grid--services {
  display: flex; flex-direction: column; gap: .55rem;
  max-width: 860px; margin-inline: auto;
}
.svc[data-svc-mode="list"] .service-card {
  position: static; transform: none; opacity: 1; filter: none;
  display: grid; grid-template-columns: 4.5rem 17rem minmax(0, 1fr);
  align-items: center; gap: .25rem 1.4rem;
  padding: 1rem 1.15rem 1rem 1.3rem; min-height: 0; overflow: visible;
  transition: border-color .25s var(--ease), background-color .25s var(--ease),
              transform .25s var(--ease);
}
/* teal left edge marker */
.svc[data-svc-mode="list"] .service-card::before {
  content: ""; top: 14px; bottom: 14px; left: 0; right: auto;
  width: 2px; height: auto; border: 0; background: var(--accent);
  opacity: .25; transition: opacity .25s var(--ease);
}
.svc[data-svc-mode="list"] .service-card::after { display: none; }   /* no per-row grid */
.svc[data-svc-mode="list"] .service-card:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background:
    linear-gradient(180deg, rgba(47, 212, 194, 0.05), rgba(47, 212, 194, 0.01)),
    rgba(18, 17, 14, 0.82);
}
.svc[data-svc-mode="list"] .service-card:hover::before { opacity: .85; }
.svc[data-svc-mode="list"] .service-card__index { grid-column: 1; align-self: center; white-space: nowrap; }
/* tag · title · description on ONE visual line; ellipsis only as a fallback */
.svc[data-svc-mode="list"] .service-card__title {
  grid-column: 2; margin: 0; font-size: 1.02rem; align-self: center;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0;
}
.svc[data-svc-mode="list"] .service-card__desc {
  grid-column: 3; margin: 0; font-size: .9rem; color: var(--ink-muted);
  align-self: center;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0;
}

/* ================================================================= MOBILE */
@media (max-width: 640px) {
  .svc__bar { justify-content: space-between; }
  .svc__mode { padding: .55rem .9rem; font-size: .74rem; }   /* larger tap target */
  .svc[data-svc-mode="list"] .service-card {
    grid-template-columns: 4.75rem 1fr; gap: .15rem 1rem; padding: .9rem 1rem;
  }
  /* on mobile let the title wrap fully (readability); description stays one line */
  .svc[data-svc-mode="list"] .service-card__title {
    grid-column: 2; white-space: normal; overflow: visible; text-overflow: clip;
  }
  .svc[data-svc-mode="list"] .service-card__desc  { grid-column: 2; }
  .svc[data-svc-mode="stack"] .card-grid--services {
    max-width: none; --svc-xstep: 6px; --svc-ystep: 10px;   /* smaller offsets stay within narrow viewports */
  }
}

/* ======================================================= REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
  .svc .service-card { transition: none !important; }
  .svc[data-svc-mode="grid"] .service-card:hover,
  .svc[data-svc-mode="grid"] .service-card:focus-within { transform: none; }
  /* stack: no movement — show only the active card, statically */
  .svc[data-svc-mode="stack"] .service-card {
    transform: none !important; filter: none !important;
    transition: none !important;
  }
  .svc[data-svc-mode="stack"] .service-card:not([data-svc-active]) {
    opacity: 0 !important; visibility: hidden;
  }
}