/* ================================================================
   PROJECT PAGE STYLES — shares the exact design tokens, fonts, and
   Swiss-editorial system as the homepage. No new colors, no new
   typefaces, no new visual language: this file only arranges the
   same tokens into a long-form reading layout.
   ================================================================ */

:root{
  --black: #0B0B0A;
  --cream: #ECE2C9;
  --paper: #E7DCC0;
  --ink: #17140E;
  --ink-dim: #55503f;
  --line-dark: rgba(236,226,201,0.16);
  --line-light: rgba(23,20,14,0.14);
  --accent: #57D9C4;
  --accent-deep: #1F6E62;
  --font-display: 'Anton', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-serif: 'Newsreader', serif;
  --ease-soft: cubic-bezier(.25,.46,.45,.94);
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{ font-family:var(--font-body); background:var(--paper); color:var(--ink); }
a{ color:inherit; }
::selection{ background:var(--accent); color:#04120D; }
h1,h2,h3{ text-wrap:balance; }
p{ text-wrap:pretty; }
@media (prefers-reduced-motion: reduce){ *{ animation:none !important; transition:none !important; } }
a:focus-visible, button:focus-visible{ outline:2px solid var(--accent-deep); outline-offset:2px; }

.skip-link{
  position:absolute; top:-100px; left:16px; z-index:100;
  background:var(--accent); color:#04120D; font-family:var(--font-mono); font-size:13px; font-weight:700;
  padding:12px 18px; border-radius:2px; transition:top .2s var(--ease-soft);
}
.skip-link:focus{ top:16px; }
.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; }

/* -------- topbar -------- */
.p-topbar{
  position:sticky; top:0; z-index:50; background:var(--black); color:var(--cream);
  display:flex; justify-content:space-between; align-items:center;
  padding:16px 46px; font-family:var(--font-mono); font-size:12px; letter-spacing:0.04em;
  border-bottom:1px solid var(--line-dark);
}
.p-topbar a{ text-decoration:none; display:inline-flex; align-items:center; gap:8px; transition:color .2s var(--ease-soft); }
.p-topbar a:hover{ color:var(--accent); }
.p-topbar .mark{ font-family:var(--font-display); font-size:16px; }

/* -------- hero -------- */
.p-hero{ background:var(--black); color:var(--cream); padding:70px 46px 60px; }
.p-hero-inner{ max-width:1000px; margin:0 auto; }
.p-eyebrow{ font-family:var(--font-mono); font-size:12px; letter-spacing:0.1em; color:var(--accent); text-transform:uppercase; margin-bottom:18px; }
.p-title{ font-family:var(--font-display); text-transform:uppercase; font-size:clamp(38px,7vw,84px); line-height:0.98; margin-bottom:22px; }
.p-tagline{ font-family:var(--font-serif); font-style:italic; font-size:19px; color:rgba(236,226,201,0.75); max-width:60ch; margin-bottom:30px; }
.p-meta-row{ display:flex; flex-wrap:wrap; gap:10px 14px; margin-bottom:34px; }
.p-tag{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.04em; border:1px solid var(--line-dark); padding:6px 12px; color:rgba(236,226,201,0.75); }
.p-tag.hi{ background:var(--accent); border-color:var(--accent); color:#04120D; font-weight:700; }
.p-actions{ display:flex; flex-wrap:wrap; gap:12px; }
.p-btn{
  font-family:var(--font-mono); font-size:13px; padding:11px 20px; border:1px solid var(--cream);
  text-decoration:none; display:inline-flex; align-items:center; gap:8px; transition:background .2s var(--ease-soft), color .2s var(--ease-soft);
}
.p-btn:hover{ background:var(--cream); color:#04120D; }
.p-btn.primary{ background:var(--accent); border-color:var(--accent); color:#04120D; font-weight:700; }
.p-btn.primary:hover{ background:var(--accent-deep); border-color:var(--accent-deep); color:var(--cream); }
.p-btn[aria-disabled="true"]{ opacity:0.35; border-color:var(--line-dark); cursor:not-allowed; pointer-events:none; }

/* -------- content sections -------- */
.p-section{ padding:64px 46px; border-bottom:1px solid var(--line-light); }
.p-section:nth-of-type(even){ background:rgba(23,20,14,0.03); }
.p-section-inner{ max-width:800px; margin:0 auto; }
.p-section h2{
  font-family:var(--font-display); text-transform:uppercase; font-size:clamp(24px,3.4vw,36px);
  margin-bottom:22px; display:flex; align-items:baseline; gap:14px;
}
.p-section h2 .p-num{ font-family:var(--font-mono); font-size:14px; color:var(--accent-deep); font-weight:400; }
.p-section p{ font-size:15.5px; line-height:1.8; color:var(--ink-dim); margin-bottom:18px; max-width:68ch; }
.p-section p strong{ color:var(--ink); font-weight:700; }
.p-section ul{ margin:0 0 18px 22px; }
.p-section li{ font-size:15px; line-height:1.75; color:var(--ink-dim); margin-bottom:6px; }

/* -------- placeholder blocks: honest "not yet filled in" affordance -------- */
.p-placeholder{
  border:1px dashed var(--line-light); background:rgba(23,20,14,0.02); padding:22px 24px;
  font-family:var(--font-mono); font-size:12.5px; color:var(--ink-dim); line-height:1.7;
}
.p-placeholder .p-fill-lbl{ color:var(--accent-deep); font-weight:700; letter-spacing:0.04em; display:block; margin-bottom:6px; }

/* -------- figure frame -------- */
.p-figure{ border:1px solid var(--line-light); background:var(--black); color:rgba(236,226,201,0.5); min-height:220px; display:flex; align-items:center; justify-content:center; text-align:center; padding:24px; font-family:var(--font-mono); font-size:12.5px; margin-bottom:14px; }
.p-figure-cap{ font-family:var(--font-mono); font-size:12px; color:var(--ink-dim); text-align:center; }

/* -------- equation block -------- */
.p-eq{ background:var(--black); color:var(--cream); padding:26px 30px; font-family:var(--font-serif); font-style:italic; font-size:17px; text-align:center; margin-bottom:10px; overflow-x:auto; }
.p-eq-cap{ font-family:var(--font-mono); font-size:11.5px; color:var(--ink-dim); text-align:center; }

/* -------- results table -------- */
.p-table-wrap{ width:100%; overflow-x:auto; margin-bottom:8px; -webkit-overflow-scrolling:touch; }
.p-table-wrap .p-table{ margin-bottom:0; }
.p-table{ width:100%; border-collapse:collapse; font-family:var(--font-mono); font-size:13px; margin-bottom:8px; min-width:460px; }
.p-table th, .p-table td{ border-bottom:1px solid var(--line-light); padding:10px 12px; text-align:left; }
.p-table th{ color:var(--ink-dim); font-weight:700; text-transform:uppercase; font-size:11px; letter-spacing:0.06em; }
.p-table td{ color:var(--ink); }
.p-table tr:first-child th{ border-top:1px solid var(--line-light); }

/* -------- ablation / failure case cards -------- */
.p-card-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line-light); border:1px solid var(--line-light); margin-bottom:8px; }
@media(max-width:700px){ .p-card-grid{ grid-template-columns:1fr; } }
.p-card{ background:var(--paper); padding:20px 22px; }
.p-card .p-card-lbl{ font-family:var(--font-mono); font-size:11px; letter-spacing:0.06em; color:var(--accent-deep); text-transform:uppercase; margin-bottom:8px; }
.p-card p{ font-size:14px; margin-bottom:0; }

/* -------- footer nav -------- */
.p-footer-nav{ background:var(--black); color:var(--cream); padding:60px 46px; text-align:center; }
.p-footer-nav a{ font-family:var(--font-mono); font-size:13px; text-decoration:underline; text-underline-offset:4px; }
.p-footer-nav a:hover{ color:var(--accent); }
.p-footer-nav .p-actions{ justify-content:center; margin:26px 0 0; }

/* ================================================================
   MOBILE-ONLY OVERRIDES — additive, desktop (>768px) untouched.
   ================================================================ */
@media (max-width:768px){
  .p-topbar{ padding:14px 20px; }
  .p-hero{ padding:52px 20px 44px; }
  .p-title{ font-size:clamp(36px, 12vw, 64px); }
  .p-tagline{ font-size:17px; line-height:1.6; max-width:none; }
  .p-section{ padding:44px 20px; }
  .p-section p{ font-size:16px; line-height:1.75; max-width:none; }
  .p-section li{ font-size:15.5px; }
  .p-eq{ padding:20px 18px; font-size:15px; }
  .p-figure{ padding:18px; font-size:12px; min-height:180px; }
  .p-footer-nav{ padding:46px 20px; }
  .p-actions{ gap:10px; }
}

@media (max-width:480px){
  .p-hero{ padding:44px 16px 36px; }
  .p-topbar{ padding:12px 16px; }
  .p-section{ padding:36px 16px; }
  .p-btn{ font-size:12.5px; padding:10px 16px; }
  .p-footer-nav{ padding:38px 16px; }
}