/* ============================================================
   Project detail page + 3D coverflow gallery.
   Uses --pa / --pb (project accent gradient) set by project.js.
   ============================================================ */

.project-page { --pa: #4f46e5; --pb: #0e9f8b; }

/* ---------- Project hero ---------- */
.proj-hero {
  position: relative; overflow: hidden;
  padding: 150px 0 70px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--pa) 10%, var(--paper)) 0%, var(--paper) 100%);
}
.proj-hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.proj-hero-bg span {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: .4; will-change: transform;
}
.proj-hero-bg span:nth-child(1) { width: 380px; height: 380px; background: var(--pa); top: -120px; left: -60px; animation: pf1 18s ease-in-out infinite; }
.proj-hero-bg span:nth-child(2) { width: 320px; height: 320px; background: var(--pb); top: -60px; right: 8%; animation: pf2 22s ease-in-out infinite; }
.proj-hero-bg span:nth-child(3) { width: 260px; height: 260px; background: var(--pa); bottom: -120px; left: 40%; opacity: .25; animation: pf3 26s ease-in-out infinite; }
@keyframes pf1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(50px,40px)} }
@keyframes pf2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-40px,30px)} }
@keyframes pf3 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(30px,-40px)} }

.proj-hero-inner { position: relative; z-index: 1; }
.proj-back { font-family: var(--font-mono); font-size: .82rem; color: var(--muted); display: inline-block; margin-bottom: 22px; transition: color .2s; }
.proj-back:hover { color: var(--ink); }
.proj-cat {
  display: inline-block; font-family: var(--font-mono); font-size: .76rem; letter-spacing: .04em;
  text-transform: uppercase; color: #fff; padding: 6px 14px; border-radius: 999px;
  background: linear-gradient(120deg, var(--pa), var(--pb)); margin-bottom: 18px;
}
.proj-title { font-family: var(--font-display); font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 600; letter-spacing: -.02em; line-height: 1.05; margin-bottom: 14px; }
.proj-tagline { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); margin-bottom: 30px; max-width: 640px; }
.proj-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.proj-cta .btn-primary { background: linear-gradient(120deg, var(--pa), var(--pb)); border: 0; }
.proj-cta .btn-primary:hover { filter: brightness(1.06); }
.proj-cta .btn-outline:hover { border-color: var(--pa); color: var(--pa); background: color-mix(in srgb, var(--pa) 8%, transparent); }

/* ---------- 3D coverflow ---------- */
.gallery-section { padding-top: 80px; }
.gallery-hint { color: var(--faint); font-family: var(--font-mono); font-size: .8rem; margin: -28px 0 8px; }
.stage {
  perspective: 1700px; perspective-origin: 50% 50%;
  height: 470px; position: relative; width: 100%;
  margin: 8px 0 6px; cursor: grab;
}
.stage:active { cursor: grabbing; }
.gallery-3d { position: absolute; inset: 0; transform-style: preserve-3d; transition: transform .25s ease-out; }
.slide-3d {
  position: absolute; left: 50%; top: 50%;
  width: 460px; height: 330px; margin: 0;
  transform: translate(-50%, -50%);
  transition: transform .55s cubic-bezier(.2,.7,.2,1), box-shadow .4s, opacity .4s;
  border-radius: 18px; overflow: hidden; cursor: pointer;
  box-shadow: 0 24px 50px -18px rgba(26,27,33,.45);
  backface-visibility: hidden; will-change: transform;
  background: var(--card); border: 1px solid var(--line);
  -webkit-box-reflect: below 8px linear-gradient(transparent 55%, rgba(0,0,0,.16));
}
.slide-3d.is-active { box-shadow: 0 30px 70px -16px color-mix(in srgb, var(--pa) 55%, rgba(26,27,33,.5)); border-color: color-mix(in srgb, var(--pa) 45%, var(--line)); }

.slide-3d.cover { color: #fff; background: linear-gradient(135deg, var(--pa), var(--pb)); border: 0; }
.cover-inner { height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 32px; text-align: left; }
.cover-icon { font-size: 3.2rem; line-height: 1; margin-bottom: 14px; filter: drop-shadow(0 6px 14px rgba(0,0,0,.25)); }
.cover-cat { font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; opacity: .85; margin-bottom: 8px; }
.slide-3d.cover h3 { font-family: var(--font-display); font-size: 1.9rem; line-height: 1.1; margin-bottom: 8px; }
.slide-3d.cover p { font-size: 1rem; opacity: .92; }

.slide-3d.shot { background: #0f1016; }
.slide-3d.shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.shot-label {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 12px;
  color: #fff; font-size: .85rem; font-weight: 500;
  background: linear-gradient(transparent, rgba(0,0,0,.78));
}

.slide-3d.panel { background: var(--card); padding: 26px 28px; display: flex; flex-direction: column; }
.slide-3d.panel h4 { font-family: var(--font-display); font-size: 1.25rem; margin-bottom: 16px; color: var(--ink); }
.panel-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 12px; }
.panel-metrics b { font-family: var(--font-display); font-size: 1.9rem; line-height: 1; background: linear-gradient(120deg, var(--pa), var(--pb)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: block; font-variant-numeric: tabular-nums; }
.panel-metrics span { font-size: .78rem; color: var(--muted); }
.panel-list { list-style: none; display: flex; flex-direction: column; gap: 10px; overflow: hidden; }
.panel-list li { position: relative; padding-left: 20px; font-size: .9rem; color: var(--ink-soft); line-height: 1.45; }
.panel-list li::before { content: '▹'; position: absolute; left: 0; color: var(--pa); }
.panel-chips { display: flex; flex-wrap: wrap; gap: 8px; align-content: flex-start; }
.panel-chips span { font-family: var(--font-mono); font-size: .8rem; padding: 6px 12px; border-radius: 8px; background: color-mix(in srgb, var(--pa) 10%, var(--paper)); color: color-mix(in srgb, var(--pa) 75%, var(--ink)); border: 1px solid color-mix(in srgb, var(--pa) 22%, var(--line)); }

/* diagram slide */
.slide-3d.diagram { justify-content: flex-start; }
.flow { display: flex; flex-direction: column; gap: 5px; margin-top: 4px; }
.flow-node { background: color-mix(in srgb, var(--pa) 12%, var(--card)); border: 1px solid color-mix(in srgb, var(--pa) 28%, var(--line)); border-radius: 10px; padding: 10px 14px; font-size: .9rem; font-weight: 600; color: var(--ink); text-align: center; }
.flow-arrow { align-self: center; color: var(--pa); font-size: .68rem; line-height: .9; opacity: .8; }
.diagram-cap { margin-top: 12px; font-size: .82rem; color: var(--muted); font-style: italic; }

.gallery-ctrls { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 14px; }
.g-btn { width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); color: var(--ink); font-size: 1.5rem; line-height: 1; cursor: pointer; transition: .2s; box-shadow: var(--shadow-sm); }
.g-btn:hover { border-color: var(--pa); color: var(--pa); transform: translateY(-2px); }
.g-dots { display: flex; gap: 8px; }
.g-dots button { width: 9px; height: 9px; border-radius: 50%; border: 0; background: var(--line); cursor: pointer; transition: .2s; padding: 0; }
.g-dots button.on { background: linear-gradient(120deg, var(--pa), var(--pb)); transform: scale(1.3); }

/* ---------- Detail grid ---------- */
.proj-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 48px; align-items: start; }
.proj-overview-text { font-size: 1.1rem; color: var(--ink-soft); line-height: 1.7; margin-bottom: 28px; }
.proj-sub { font-family: var(--font-display); font-size: 1.25rem; margin-bottom: 16px; }
.proj-aside { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 100px; }
.proj-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
.proj-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 16px; }
.proj-metrics { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.proj-metrics b { font-family: var(--font-display); font-size: 1.7rem; line-height: 1; background: linear-gradient(120deg, var(--pa), var(--pb)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: block; font-variant-numeric: tabular-nums; }
.proj-metrics span { font-size: .76rem; color: var(--muted); }
.proj-repo-btn { background: linear-gradient(120deg, var(--pa), var(--pb)); border: 0; justify-content: center; }
.proj-repo-btn:hover { filter: brightness(1.06); transform: translateY(-2px); }

/* ---------- More projects ---------- */
.more-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.more-card { display: flex; align-items: center; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; transition: .25s; box-shadow: var(--shadow-sm); }
.more-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--pa) 45%, var(--line)); box-shadow: var(--shadow-md); }
.more-icon { font-size: 1.7rem; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: linear-gradient(135deg, color-mix(in srgb, var(--pa) 16%, var(--paper)), color-mix(in srgb, var(--pb) 16%, var(--paper))); flex-shrink: 0; }
.more-card strong { display: block; font-family: var(--font-display); font-size: 1rem; }
.more-card span { font-size: .82rem; color: var(--muted); }
.more-arrow { margin-left: auto; color: var(--pa); font-size: 1.2rem; transition: transform .2s; }
.more-card:hover .more-arrow { transform: translateX(4px); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .proj-grid { grid-template-columns: 1fr; gap: 32px; }
  .proj-aside { position: static; }
  .stage { height: 380px; }
  .slide-3d { width: 360px; height: 260px; }
  .slide-3d.cover h3 { font-size: 1.6rem; }
}
@media (max-width: 560px) {
  .proj-hero { padding: 130px 0 50px; }
  .stage { height: 320px; }
  .slide-3d { width: 270px; height: 200px; border-radius: 14px; }
  .cover-inner { padding: 22px; }
  .cover-icon { font-size: 2.4rem; }
  .slide-3d.cover h3 { font-size: 1.35rem; }
  .slide-3d.panel { padding: 20px; }
  .slide-3d.panel h4 { font-size: 1.05rem; margin-bottom: 10px; }
  .panel-metrics b { font-size: 1.4rem; }
  .panel-list li { font-size: .82rem; }
}