/* ==========================================================================
   KARKHANA — Design System
   02_components.css : buttons, cards, spec system, figures, forms, motion
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--fg);
  --btn-line: var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: 14px 24px;
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-line);
  border-radius: var(--r-sm);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: color var(--t-med) var(--ease-out),
              border-color var(--t-med) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
  white-space: nowrap;
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--marigold);
  transform: translateY(101%);
  transition: transform var(--t-med) var(--ease-out);
}
.btn:hover { color: var(--ink); border-color: var(--marigold); }
.btn:hover::after { transform: translateY(0); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  --btn-bg: var(--marigold);
  --btn-fg: var(--ink);
  --btn-line: var(--marigold);
}
.btn-primary::after { background: var(--ink); }
.btn-primary:hover { color: var(--marigold); border-color: var(--ink); }

.btn-ghost { --btn-line: transparent; }
.btn-ghost::after { background: var(--marigold); }

.btn-sm { padding: 10px 16px; font-size: .7rem; }
.btn-lg { padding: 18px 32px; font-size: .8rem; }
.btn-block { width: 100%; }

.btn-arrow::before {
  content: "→";
  transition: transform var(--t-med) var(--ease-out);
}
.btn:hover.btn-arrow::before { transform: translateX(4px); }

/* Text link with rule underline */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 3px;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--t-med) var(--ease-out);
}
.tlink:hover { background-size: 0% 1px; }
.tlink::after { content: "→"; transition: transform var(--t-med) var(--ease-out); }
.tlink:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   2. CARDS & SURFACES
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: var(--s-6);
  transition: border-color var(--t-med) var(--ease-out),
              transform var(--t-med) var(--ease-out),
              background var(--t-med) var(--ease-out);
}
.card-hover:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  transform: translateY(-3px);
}
.card-flat { background: transparent; }
.card-pad-lg { padding: clamp(24px, 3.2vw, 44px); }
.card-tight { padding: var(--s-5); }

/* Numbered index card (capability pillars) */
.idx-card {
  position: relative;
  padding: var(--s-6) var(--s-5) var(--s-6);
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  transition: border-color var(--t-med) var(--ease-out);
}
.idx-card::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--t-slow) var(--ease-out);
}
.idx-card:hover::before { width: 100%; }
.idx-card .idx {
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  color: var(--accent);
  letter-spacing: var(--tracking-mono);
}

/* --------------------------------------------------------------------------
   3. THE SPEC SYSTEM — the core data component
   -------------------------------------------------------------------------- */
.spec {
  border-top: 1px solid var(--line);
}
.spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto);
  gap: var(--s-4);
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.spec-row dt {
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0;
  min-width: 0;
}
.spec-row dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--f-mono);
  font-size: var(--fs-mono-lg);
  font-weight: 500;
  color: var(--fg);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.spec-row dd.hl { color: var(--accent); }
.spec-row dd small {
  display: block;
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-top: 2px;
}
.spec-dense .spec-row { padding: 7px 0; }

/* Inside the summary card the spec rows are full-bleed, so the values need
   their own inset or they sit flush against the panel border. */
.summary .spec-row { padding-inline: 20px; }

/* Inline data strip */
.data-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.data-strip > div {
  flex: 1 1 140px;
  padding: var(--s-4) var(--s-4) var(--s-4) 0;
  border-right: 1px solid var(--line);
}
.data-strip > div:last-child { border-right: 0; }
.data-strip dt {
  font-family: var(--f-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 4px;
}
.data-strip dd {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.1vw, 1.85rem);
  letter-spacing: -.02em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.data-strip dd span {
  font-family: var(--f-mono);
  font-size: .62rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-left: 5px;
  vertical-align: middle;
}

/* --------------------------------------------------------------------------
   4. TAGS, CHIPS, SWATCHES
   -------------------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-family: var(--f-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  white-space: nowrap;
}
.tag-accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.tag-solid { background: var(--marigold); color: var(--ink); border-color: var(--marigold); }
.tag-dot::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.swatch {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform var(--t-med) var(--ease-out);
}
.swatch-chip {
  position: relative;
  width: 44px; height: 44px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  cursor: pointer;
  flex: none;
  transition: transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
}
.swatch-chip::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  transition: border-color var(--t-fast) var(--ease-out);
}
.swatch-chip:hover { transform: scale(1.06); }
.swatch-chip[aria-pressed="true"]::after { border-color: var(--accent); }
.swatch-chip[aria-pressed="true"] { box-shadow: 0 0 0 1px var(--accent); }

.swatch-name {
  font-family: var(--f-mono);
  font-size: .64rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-top: 6px;
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   5. FIGURES — images with LQIP, dimension callouts
   -------------------------------------------------------------------------- */
.fig {
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  isolation: isolate;
}
.fig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out);
}
.fig img.is-loaded { opacity: 1; }
.fig-zoom:hover img { transform: scale(1.045); }
.fig-ratio-4-3 { aspect-ratio: 4 / 3; }
.fig-ratio-1-1 { aspect-ratio: 1 / 1; }
.fig-ratio-3-4 { aspect-ratio: 3 / 4; }
.fig-ratio-16-9 { aspect-ratio: 16 / 9; }
.fig-ratio-21-9 { aspect-ratio: 21 / 9; }
.fig-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: -1;
}

/* Dimension callout — the signature annotation */
.callout {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg);
  white-space: nowrap;
  z-index: 2;
}
.callout::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.callout::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px; height: 5px;
  margin-top: -2.5px;
  border-radius: 50%;
  background: var(--accent);
}
.callout-r { flex-direction: row-reverse; }
.callout-r::before { order: 2; }
.callout-r::after { left: auto; right: 0; }
.callout-box {
  background: color-mix(in srgb, var(--ink) 82%, transparent);
  border: 1px solid var(--line);
  padding: 5px 9px;
  border-radius: var(--r-sm);
  backdrop-filter: blur(6px);
}

/* --------------------------------------------------------------------------
   6. MARQUEE
   -------------------------------------------------------------------------- */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding-block: var(--s-4);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 38s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: var(--s-4);
  padding-right: var(--s-4);
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap;
}
.marquee-item::after {
  content: "";
  width: 5px; height: 5px;
  background: var(--accent);
  transform: rotate(45deg);
  flex: none;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* --------------------------------------------------------------------------
   7. STATS
   -------------------------------------------------------------------------- */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat-value {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 4.4vw, 3.9rem);
  line-height: .95;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
}
.stat-value .unit {
  font-family: var(--f-mono);
  font-size: .26em;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--accent);
  vertical-align: super;
  margin-left: 3px;
}
.stat-label {
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   8. FORMS
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.field > label,
.field-label {
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--fg-muted);
}
.field .req { color: var(--madder-lt); }

.input, .select, .textarea {
  width: 100%;
  padding: 13px 14px;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--fg);
  font-size: var(--fs-body);
  transition: border-color var(--t-fast) var(--ease-out),
              background var(--t-fast) var(--ease-out);
  appearance: none;
}
.theme-paper .input, .theme-paper .select, .theme-paper .textarea { background: #FBF9F4; }
.input::placeholder, .textarea::placeholder { color: var(--fg-muted); opacity: .65; }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-soft);
}
.textarea { resize: vertical; min-height: 118px; line-height: 1.6; }

.select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%237C8590' stroke-width='1.4' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  cursor: pointer;
}
.select option { background: var(--ink-2); color: var(--fg); }

.field-error {
  font-family: var(--f-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--madder-lt);
  min-height: 0;
}
.input[aria-invalid="true"], .select[aria-invalid="true"], .textarea[aria-invalid="true"] {
  border-color: var(--madder);
}

/* Checkbox / radio as selectable cards */
.choice {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease-out),
              background var(--t-fast) var(--ease-out);
}
.choice:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.choice input { position: absolute; opacity: 0; width: 0; height: 0; }
.choice .box {
  width: 15px; height: 15px;
  flex: none;
  margin-top: 3px;
  border: 1px solid var(--fg-muted);
  border-radius: 2px;
  display: grid;
  place-items: center;
  transition: border-color var(--t-fast) var(--ease-out);
}
.choice .box::after {
  content: "";
  width: 7px; height: 7px;
  background: var(--accent);
  transform: scale(0);
  transition: transform var(--t-fast) var(--ease-out);
}
.choice input:checked ~ .box { border-color: var(--accent); }
.choice input:checked ~ .box::after { transform: scale(1); }
.choice:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}
.choice:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: 2px; }
.choice-body { display: flex; flex-direction: column; gap: 2px; }
.choice-title { font-size: var(--fs-sm); font-weight: 500; }
.choice-sub {
  font-family: var(--f-mono);
  font-size: .66rem;
  letter-spacing: .06em;
  color: var(--fg-muted);
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   9. TABS / ACCORDION
   -------------------------------------------------------------------------- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 14px 20px;
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--fg-muted);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}
.tab:hover { color: var(--fg); }
.tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel[hidden] { display: none; }

.acc-item { border-bottom: 1px solid var(--line); }
.acc-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding: 20px 0;
  text-align: left;
  font-family: var(--f-display);
  font-size: var(--fs-h4);
  font-weight: 600;
  letter-spacing: -.015em;
  transition: color var(--t-fast) var(--ease-out);
}
.acc-trigger:hover { color: var(--accent); }
.acc-icon {
  flex: none;
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--f-mono);
  font-size: .8rem;
  color: var(--accent);
  transition: transform var(--t-med) var(--ease-out), background var(--t-med) var(--ease-out);
}
.acc-trigger[aria-expanded="true"] .acc-icon { transform: rotate(45deg); background: var(--accent); color: var(--accent-fg); }
.acc-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-med) var(--ease-out);
}
.acc-panel > div { overflow: hidden; }
.acc-trigger[aria-expanded="true"] + .acc-panel { grid-template-rows: 1fr; }
.acc-content { padding-bottom: 24px; max-width: 70ch; color: var(--fg-muted); }

/* --------------------------------------------------------------------------
   10. PROCESS STEPS
   -------------------------------------------------------------------------- */
.step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--s-5);
  padding: var(--s-6) 0;
  border-top: 1px solid var(--line);
  transition: border-color var(--t-med) var(--ease-out);
}
.step:hover { border-top-color: var(--accent); }
.step-num {
  font-family: var(--f-mono);
  font-size: var(--fs-mono-lg);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: .06em;
  padding-top: 3px;
}
.step-body { display: flex; flex-direction: column; gap: 9px; }
.step-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: 4px;
}
.step-meta span {
  font-family: var(--f-mono);
  font-size: .66rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 3px 9px;
}
.step.is-active { border-top-color: var(--accent); }

/* --------------------------------------------------------------------------
   11. BADGES / PROOF
   -------------------------------------------------------------------------- */
.proof {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.proof:last-child { border-bottom: 1px solid var(--line); }
.proof-icon {
  width: 38px; height: 38px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--accent);
}
.proof-icon svg { width: 17px; height: 17px; }

/* --------------------------------------------------------------------------
   12. REVEAL MOTION
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-reveal) var(--ease-out), transform var(--t-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal="fade"] { transform: none; }
[data-reveal="clip"] {
  opacity: 1;
  transform: none;
  clip-path: inset(0 0 100% 0);
  transition: clip-path var(--t-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal="clip"].is-in { clip-path: inset(0 0 0 0); }
[data-reveal="scale"] { transform: translateY(18px) scale(.975); }
[data-reveal="scale"].is-in { transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; clip-path: none; }
}

/* --------------------------------------------------------------------------
   13. UTILITIES
   -------------------------------------------------------------------------- */
.center { text-align: center; }
.center .lead { margin-inline: auto; }
.right { text-align: right; }
.full { width: 100%; }
.rel { position: relative; z-index: 1; }
.no-scroll { overflow: hidden; }
.hide-sm { }
@media (max-width: 720px) { .hide-sm { display: none; } }
.only-sm { display: none; }
@media (max-width: 720px) { .only-sm { display: revert; } }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px; left: 8px;
  z-index: 200;
  padding: 12px 18px;
  background: var(--marigold);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  border-radius: var(--r-sm);
  transform: translateY(-160%);
  transition: transform var(--t-fast) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }