/* ============ Adam Byrne — knife prototype ============ */

:root {
  --bg: #f3efe7;          /* bone */
  --bg-deep: #ece7dc;
  --ink: #26231f;         /* charcoal */
  --ink-soft: #6b655c;
  --oxblood: #6e1423;
  --signal: #c2452d;      /* live interaction color */
  --steel: #a8a49c;
  --line: #d8d2c6;
  --panel-max: 34rem;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: var(--font-mono); }

/* ============ Layout ============ */

.hero {
  display: grid;
  grid-template-columns: minmax(22rem, 5fr) 7fr;
  min-height: calc(100vh - 7.5rem);
  max-width: 90rem;
  margin: 0 auto;
  padding: 2rem 3rem 0;
  gap: 2rem;
  align-items: center;
}

/* ============ Copy column / panels ============ */

.copy { position: relative; max-width: var(--panel-max); }

.panel {
  display: none;
  animation: panel-in 480ms cubic-bezier(.22,.9,.3,1) both;
}
.panel.is-active { display: block; }

@keyframes panel-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .panel { animation: none; }
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin: 0 0 1.4rem;
}

.headline {
  font-size: clamp(1.9rem, 3.4vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 650;
  margin: 0 0 1.2rem;
}

.body-copy { color: var(--ink); margin: 0 0 0.9rem; max-width: 30rem; }

.kicker {
  font-weight: 600;
  color: var(--oxblood);
  margin: 1.3rem 0 0.6rem;
}

.hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-top: 2.2rem;
  transition: opacity 600ms ease;
}
.hint.is-hidden { opacity: 0; }

/* featured case studies */
.featured {
  list-style: none;
  margin: 1.4rem 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.featured li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}
.featured .proj { font-weight: 600; }
.featured .meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.tags {
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 0.4rem 0 1.6rem;
}

/* ============ CTAs ============ */

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.6rem; }

.cta {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  font: 600 0.85rem/1 var(--font-body);
  letter-spacing: 0.02em;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}
.cta:hover { transform: translateY(-1px); }
.cta:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.cta-secondary { background: transparent; color: var(--ink); }
.cta-secondary:hover { background: var(--ink); color: var(--bg); }
.cta-ghost { background: transparent; color: var(--ink-soft); border-color: transparent; }
.cta-ghost:hover { color: var(--ink); }

/* ============ Stage ============ */

.stage {
  position: relative;
  height: min(74vh, 46rem);
  min-height: 22rem;
  border-radius: 1.25rem;
  background:
    radial-gradient(120% 90% at 50% 30%, #faf7f0 0%, var(--bg-deep) 68%, #e2dccf 100%);
  overflow: hidden;
}

#knife-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: pan-y;      /* vertical swipes still scroll the page */
  cursor: grab;
}
#knife-canvas.is-dragging { cursor: grabbing; }
#knife-canvas.is-hover { cursor: pointer; }

.reset-view {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  border: 1px solid var(--line);
  background: rgba(250, 247, 240, 0.8);
  color: var(--ink-soft);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
}
.reset-view:hover { color: var(--ink); }
.reset-view:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }

/* loading state: poster + progress until the model is ready */
.stage-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 450ms ease;
}
.stage-loading img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.stage-loading #loading-label {
  position: absolute;
  bottom: 1.1rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  animation: loading-pulse 1.6s ease-in-out infinite;
}
@keyframes loading-pulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .stage-loading #loading-label { animation: none; }
  .stage-loading { transition: none; }
}
.stage-loading.is-done { opacity: 0; pointer-events: none; }
.stage-loading[hidden] { display: none; }

/* fallback when WebGL is unavailable */
.stage-fallback[hidden] { display: none; }

.stage-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 2rem;
  text-align: center;
  color: var(--ink-soft);
}
.stage-fallback .fallback-poster {
  max-width: 100%;
  max-height: 80%;
  object-fit: contain;
}
.stage-fallback .small { font-size: 0.72rem; }

/* ============ Tool nav ============ */

.tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  max-width: 90rem;
  margin: 0 auto;
  padding: 1.4rem 3rem;
}

.tool-nav button {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font: 500 0.82rem/1 var(--font-body);
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: border-color 160ms ease, background 160ms ease;
}
.tool-nav button .num {
  font-size: 0.62rem;
  color: var(--steel);
  letter-spacing: 0.08em;
}
.tool-nav button:hover { border-color: var(--ink); }
.tool-nav button:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
.tool-nav button[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.tool-nav button[aria-pressed="true"] .num { color: var(--signal); }

/* ============ Below-hero sections ============ */

.section-head { margin: 0 0 2.4rem; }
.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  letter-spacing: -0.01em;
  font-weight: 650;
  margin: 0;
}

/* proof strip */
.proof {
  max-width: 90rem;
  margin: 0 auto;
  padding: 4.5rem 3rem 3.5rem;
  border-top: 1px solid var(--line);
}
.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 2rem 2.5rem;
  margin: 0;
}
.proof-grid dt {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--oxblood);
}
.proof-grid dd {
  margin: 0.3rem 0 0;
  font-size: 0.82rem;
  color: var(--ink-soft);
  max-width: 14rem;
}

/* selected work */
.work {
  max-width: 64rem;
  margin: 0 auto;
  padding: 4.5rem 3rem;
}
.work-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.work-list li {
  display: grid;
  grid-template-columns: 3rem 1fr auto;
  gap: 1.25rem;
  align-items: baseline;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}
.work-list .w-num { font-size: 0.7rem; color: var(--steel); }
.work-list h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.005em;
}
.work-list p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 36rem;
}
.work-list .w-cat {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--oxblood);
  white-space: nowrap;
}

/* about */
.about {
  max-width: 64rem;
  margin: 0 auto;
  padding: 4.5rem 3rem;
  border-top: 1px solid var(--line);
}
.about-copy { max-width: 38rem; }
.about-copy p { margin: 0 0 1rem; }

/* final conversion */
.convert {
  max-width: 90rem;
  margin: 0 auto;
  padding: 6rem 3rem 7rem;
  text-align: center;
  border-top: 1px solid var(--line);
}
.convert h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.015em;
  font-weight: 650;
  margin: 0 0 1rem;
}
.convert-body {
  color: var(--ink-soft);
  margin: 0 0 2.2rem;
  font-size: 1.05rem;
}
.convert-ctas { justify-content: center; }

@media (max-width: 900px) {
  .proof, .work, .about { padding-left: 1.25rem; padding-right: 1.25rem; }
  .convert { padding: 4rem 1.25rem 5rem; }
  .work-list li { grid-template-columns: 2rem 1fr; }
  .work-list .w-cat { grid-column: 2; }
}

/* ============ Footer credit ============ */

.credit {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 2rem;
  justify-content: space-between;
  max-width: 90rem;
  margin: 0 auto;
  padding: 0.8rem 3rem 1.4rem;
  font-size: 0.65rem;
  color: var(--ink-soft);
}
.credit a { color: inherit; }

/* ============ Mobile ============ */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 1rem 1.25rem 0;
    gap: 1.25rem;
    min-height: 0;
  }
  /* knife on top, copy below */
  .stage { order: -1; height: 52vh; min-height: 18rem; }
  .copy { max-width: none; }
  .headline { font-size: clamp(1.6rem, 6.4vw, 2.2rem); }
  .tool-nav {
    position: sticky;
    bottom: 0;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(8px);
    padding: 0.7rem 0.8rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
  }
  .tool-nav button { flex: none; }
  .credit { padding: 0.8rem 1.25rem 1.2rem; }
}