/* ============================================================
   TERRADYNE MATERIAL TECHNOLOGY
   Design system — "Sovereign Infrastructure"
   Deep graphite base · steel-teal accent · restrained amber
   ============================================================ */

/* ---------- Type scale ---------- */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.6vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 5vw, 5.25rem);

  /* Spacing */
  --space-1: 0.25rem;  --space-2: 0.5rem;  --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem;  --space-6: 1.5rem;  --space-8: 2rem;    --space-10: 2.5rem;
  --space-12: 3rem;    --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.25rem; --radius-md: 0.5rem; --radius-lg: 0.875rem; --radius-full: 9999px;
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 680px;
  --content-default: 1040px;
  --content-wide: 1280px;

  --font-display: 'Cabinet Grotesk', 'Arial', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
  --font-mono: 'Geist Mono', 'Consolas', monospace;
}

/* ---------- Dark (default for this brand) ---------- */
:root, [data-theme='dark'] {
  --color-bg:            #0c0f10;
  --color-surface:       #12171a;
  --color-surface-2:     #171d20;
  --color-surface-3:     #1c2429;
  --color-border:        #263136;
  --color-divider:       #1d262a;

  --color-text:          #e6ecec;
  --color-text-muted:    #93a1a3;
  --color-text-faint:    #5f6d70;
  --color-text-inverse:  #0c0f10;

  --color-primary:       #3fb6c4;   /* steel-teal */
  --color-primary-hover: #63cdda;
  --color-primary-deep:  #1c6f7a;
  --color-primary-glow:  rgba(63, 182, 196, 0.18);

  --color-amber:         #d9962f;   /* heavy-fraction accent, sparing */
  --color-amber-soft:    rgba(217, 150, 47, 0.14);

  --grid-line: rgba(63, 182, 196, 0.06);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);
}

[data-theme='light'] {
  --color-bg:            #eef1f1;
  --color-surface:       #f7f9f9;
  --color-surface-2:     #ffffff;
  --color-surface-3:     #eceff0;
  --color-border:        #cdd6d7;
  --color-divider:       #dbe2e2;

  --color-text:          #101819;
  --color-text-muted:    #4c5a5c;
  --color-text-faint:    #7d8b8d;
  --color-text-inverse:  #f7f9f9;

  --color-primary:       #12707c;
  --color-primary-hover: #0d565f;
  --color-primary-deep:  #0d565f;
  --color-primary-glow:  rgba(18, 112, 124, 0.12);

  --color-amber:         #a5680f;
  --color-amber-soft:    rgba(165, 104, 15, 0.10);

  --grid-line: rgba(18, 112, 124, 0.07);
  --shadow-md: 0 8px 28px rgba(20,40,44,0.10);
  --shadow-lg: 0 24px 60px rgba(20,40,44,0.14);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;scroll-behavior:smooth;
  scroll-padding-top:5rem;
}
body{
  min-height:100dvh;line-height:1.6;font-family:var(--font-body);
  font-size:var(--text-base);color:var(--color-text);background:var(--color-bg);
  overflow-x:hidden;
}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
ul[role='list']{list-style:none}
input,button,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;line-height:1.08;letter-spacing:-0.02em;font-weight:700}
p,li{text-wrap:pretty;max-width:70ch}
a{color:inherit;text-decoration:none}
button{cursor:pointer;background:none;border:none}
table{border-collapse:collapse;width:100%}
::selection{background:var(--color-primary-glow);color:var(--color-text)}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px;border-radius:var(--radius-sm)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
a,button,[role='button'],input,textarea,select{transition:color var(--transition-interactive),background var(--transition-interactive),border-color var(--transition-interactive),box-shadow var(--transition-interactive),transform var(--transition-interactive)}
.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}

/* ---------- Layout primitives ---------- */
.wrap{width:min(100% - 2.5rem, var(--content-wide));margin-inline:auto}
.wrap-default{width:min(100% - 2.5rem, var(--content-default));margin-inline:auto}
.wrap-narrow{width:min(100% - 2.5rem, var(--content-narrow));margin-inline:auto}
section{padding-block:clamp(var(--space-16),9vw,var(--space-32))}
.section-tight{padding-block:clamp(var(--space-12),6vw,var(--space-20))}

.eyebrow{
  font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.22em;
  text-transform:uppercase;color:var(--color-primary);
  display:inline-flex;align-items:center;gap:var(--space-2);margin-bottom:var(--space-5);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--color-primary);opacity:.7}

.lede{font-size:var(--text-lg);color:var(--color-text-muted);max-width:60ch;line-height:1.55}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:var(--space-2);
  font-size:var(--text-sm);font-weight:600;padding:0.75rem 1.35rem;
  border-radius:var(--radius-sm);letter-spacing:0.01em;white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--color-primary);color:#04191c;font-weight:700}
.btn-primary:hover{background:var(--color-primary-hover);transform:translateY(-2px)}
.btn-ghost{border:1px solid var(--color-border);color:var(--color-text)}
.btn-ghost:hover{border-color:var(--color-primary);color:var(--color-primary);transform:translateY(-2px)}
.btn-lg{padding:0.9rem 1.75rem;font-size:var(--text-base)}

/* ---------- Header ---------- */
.header{
  position:sticky;top:0;z-index:80;
  background:color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--color-divider);
}
.header-inner{display:flex;align-items:center;gap:var(--space-6);height:4.25rem}
.brand{display:flex;align-items:center;gap:var(--space-3);font-family:var(--font-display);font-weight:700;letter-spacing:-0.01em}
.brand svg{width:30px;height:30px;color:var(--color-primary)}
.brand span{font-size:var(--text-base)}
.brand small{display:block;font-family:var(--font-mono);font-size:0.6rem;letter-spacing:0.18em;color:var(--color-text-faint);text-transform:uppercase;font-weight:500;margin-top:1px}
.nav{display:flex;align-items:center;gap:var(--space-6);margin-left:auto}
.nav a{font-size:var(--text-sm);color:var(--color-text-muted);font-weight:500}
.nav a:hover,.nav a.active{color:var(--color-text)}
.header-actions{display:flex;align-items:center;gap:var(--space-3)}
.icon-btn{width:38px;height:38px;display:grid;place-items:center;border-radius:var(--radius-sm);color:var(--color-text-muted);border:1px solid transparent}
.icon-btn:hover{color:var(--color-primary);border-color:var(--color-border)}
.menu-btn{display:none}

/* ---------- Track pill (context banner) ---------- */
.track-banner{
  background:var(--color-surface);border-bottom:1px solid var(--color-divider);
  font-size:var(--text-xs);color:var(--color-text-muted);
}
.track-banner .wrap{display:flex;align-items:center;gap:var(--space-4);padding-block:var(--space-3);flex-wrap:wrap}
.track-banner .tag{font-family:var(--font-mono);letter-spacing:0.16em;text-transform:uppercase;color:var(--color-text-faint)}
.track-banner a{color:var(--color-primary);font-weight:600}
.track-banner a:hover{text-decoration:underline}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding-block:clamp(var(--space-20),12vw,var(--space-32))}
.hero-bg{position:absolute;inset:0;z-index:-2;background:
  radial-gradient(900px 600px at 78% 20%, var(--color-primary-glow), transparent 60%),
  radial-gradient(700px 500px at 10% 90%, var(--color-amber-soft), transparent 55%),
  var(--color-bg);}
.grid-overlay{position:absolute;inset:0;z-index:-1;opacity:.9;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(closest-side at 70% 40%, black, transparent 90%);}
.hero h1{font-size:var(--text-3xl);max-width:16ch;margin-bottom:var(--space-6)}
.hero .lede{font-size:var(--text-lg);max-width:56ch;margin-bottom:var(--space-8)}
.hero-grad{color:var(--color-primary)}
.hero-cta{display:flex;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-16)}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:var(--space-6);border-top:1px solid var(--color-divider);padding-top:var(--space-8);max-width:var(--content-default)}
.stat .num{font-family:var(--font-display);font-size:var(--text-xl);color:var(--color-text);font-weight:700}
.stat .num em{font-style:normal;color:var(--color-primary)}
.stat .lbl{font-size:var(--text-sm);color:var(--color-text-muted);margin-top:var(--space-1)}

/* ---------- Two-door split ---------- */
.doors{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-5)}
.door{
  position:relative;border:1px solid var(--color-border);border-radius:var(--radius-lg);
  padding:var(--space-8);background:var(--color-surface);overflow:hidden;
  display:flex;flex-direction:column;gap:var(--space-4);min-height:260px;
}
.door::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(400px 200px at 100% 0%, var(--color-primary-glow), transparent 70%);opacity:0;transition:opacity var(--transition-interactive)}
.door:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:var(--shadow-md)}
.door:hover::after{opacity:1}
.door .door-k{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.18em;text-transform:uppercase;color:var(--color-text-faint)}
.door h3{font-size:var(--text-lg)}
.door p{font-size:var(--text-sm);color:var(--color-text-muted);flex:1}
.door .go{display:inline-flex;align-items:center;gap:var(--space-2);color:var(--color-primary);font-weight:600;font-size:var(--text-sm)}
.door:hover .go{gap:var(--space-3)}

/* ---------- Pillars ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-6)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-10);align-items:center}
.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-8)}
.card .k{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-primary);letter-spacing:0.12em}
.card h3{font-size:var(--text-lg);margin:var(--space-3) 0 var(--space-3)}
.card p{font-size:var(--text-sm);color:var(--color-text-muted)}
.card-icon{width:44px;height:44px;border-radius:var(--radius-sm);display:grid;place-items:center;background:var(--color-primary-glow);color:var(--color-primary);margin-bottom:var(--space-5)}
.card-icon svg{width:22px;height:22px}

/* ---------- Section heads ---------- */
.sec-head{max-width:var(--content-default);margin-bottom:var(--space-12)}
.sec-head h2{font-size:var(--text-2xl);margin-bottom:var(--space-4)}
.sec-head p{font-size:var(--text-base);color:var(--color-text-muted);max-width:62ch}

/* ---------- Ecosystem chain ---------- */
.chain{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:var(--space-4);align-items:stretch}
.chain-node{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6)}
.chain-node.mid{border-color:var(--color-primary);box-shadow:0 0 0 1px var(--color-primary), var(--shadow-md)}
.chain-node .stage{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.16em;text-transform:uppercase;color:var(--color-text-faint);margin-bottom:var(--space-3)}
.chain-node h4{font-size:var(--text-base);margin-bottom:var(--space-2)}
.chain-node.mid h4{color:var(--color-primary)}
.chain-node p{font-size:var(--text-sm);color:var(--color-text-muted)}
.chain-arrow{display:grid;place-items:center;color:var(--color-primary);font-size:1.5rem}

/* ---------- Process diagram ---------- */
.diagram-wrap{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-8)}
.diagram-wrap svg{width:100%;height:auto}

/* ---------- Disclosure table ---------- */
.disclose{border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}
.disclose table{font-size:var(--text-sm)}
.disclose th,.disclose td{padding:var(--space-4) var(--space-5);text-align:left;vertical-align:top;border-bottom:1px solid var(--color-divider)}
.disclose thead th{background:var(--color-surface-2);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.1em;text-transform:uppercase;color:var(--color-text-muted)}
.disclose tbody tr:last-child td{border-bottom:none}
.disclose .say{color:var(--color-text)}
.disclose .hold{color:var(--color-text-muted)}
.disclose .col-say{width:50%}
.pill{display:inline-block;font-family:var(--font-mono);font-size:0.65rem;letter-spacing:0.08em;padding:2px 8px;border-radius:var(--radius-full);text-transform:uppercase;font-weight:600}
.pill.ok{background:var(--color-primary-glow);color:var(--color-primary)}
.pill.no{background:var(--color-amber-soft);color:var(--color-amber)}

/* ---------- List with markers ---------- */
.marks{list-style:none;display:grid;gap:var(--space-4)}
.marks li{position:relative;padding-left:var(--space-8);color:var(--color-text-muted);font-size:var(--text-base)}
.marks li strong{color:var(--color-text);font-weight:600}
.marks li::before{content:"";position:absolute;left:0;top:0.55em;width:14px;height:1px;background:var(--color-primary)}

/* ---------- Comparison (skid vs pond) ---------- */
.vs{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-5)}
.vs .col{border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-8)}
.vs .col.old{opacity:.92}
.vs .col.new{border-color:var(--color-primary)}
.vs .col h4{font-size:var(--text-lg);margin-bottom:var(--space-5);display:flex;align-items:center;gap:var(--space-3)}
.vs .col.new h4 .dot{color:var(--color-primary)}
.vs .col ul{list-style:none;display:grid;gap:var(--space-3)}
.vs .col li{font-size:var(--text-sm);color:var(--color-text-muted);padding-left:var(--space-6);position:relative}
.vs .col.old li::before{content:"×";position:absolute;left:0;color:var(--color-amber);font-weight:700}
.vs .col.new li::before{content:"→";position:absolute;left:0;color:var(--color-primary);font-weight:700}

/* ---------- CTA band ---------- */
.cta-band{background:var(--color-surface);border-top:1px solid var(--color-divider);border-bottom:1px solid var(--color-divider)}
.cta-band .inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-8);flex-wrap:wrap}
.cta-band h2{font-size:var(--text-xl);max-width:24ch}
.cta-band p{color:var(--color-text-muted);font-size:var(--text-sm);max-width:46ch;margin-top:var(--space-3)}

/* ---------- Maturity / TRL ---------- */
.trl{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5)}
.trl .stage{border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);position:relative}
.trl .stage .badge{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.12em;text-transform:uppercase;color:var(--color-primary);margin-bottom:var(--space-3)}
.trl .stage h4{font-size:var(--text-base);margin-bottom:var(--space-2)}
.trl .stage p{font-size:var(--text-sm);color:var(--color-text-muted)}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-5)}
.field{display:flex;flex-direction:column;gap:var(--space-2)}
.field.full{grid-column:1/-1}
.field label{font-size:var(--text-sm);color:var(--color-text-muted);font-weight:500}
.field input,.field select,.field textarea{
  background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);
  padding:0.7rem 0.85rem;font-size:var(--text-sm);color:var(--color-text);
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--color-primary);outline:none}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:var(--text-xs);color:var(--color-text-faint);margin-top:var(--space-4)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--color-divider);background:var(--color-surface);padding-block:var(--space-16) var(--space-8)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:var(--space-8)}
.footer h5{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.16em;text-transform:uppercase;color:var(--color-text-faint);margin-bottom:var(--space-4)}
.footer a{display:block;font-size:var(--text-sm);color:var(--color-text-muted);margin-bottom:var(--space-3)}
.footer a:hover{color:var(--color-primary)}
.footer .about p{font-size:var(--text-sm);color:var(--color-text-muted);margin-top:var(--space-4);max-width:38ch}
.footer-bottom{border-top:1px solid var(--color-divider);margin-top:var(--space-12);padding-top:var(--space-6);display:flex;justify-content:space-between;gap:var(--space-4);flex-wrap:wrap;font-size:var(--text-xs);color:var(--color-text-faint)}

/* ---------- Parent-company badge (rounded square) ---------- */
.parent-head{display:flex;align-items:center;gap:var(--space-4);margin-top:var(--space-3)}
.co-badge{
  flex:none;width:64px;height:64px;border-radius:var(--radius-lg);
  display:grid;place-items:center;
  font-family:var(--font-display);font-weight:800;font-size:var(--text-lg);letter-spacing:-0.02em;
  color:var(--color-primary);
  background:var(--color-primary-glow);
  border:1px solid var(--color-primary);
  box-shadow:0 0 0 4px color-mix(in oklab, var(--color-primary) 10%, transparent);
}
.parent-head h3{margin:0}

/* ---------- Disclaimer ---------- */
.disclaimer{background:var(--color-surface-2);border:1px solid var(--color-border);border-left:2px solid var(--color-amber);border-radius:var(--radius-md);padding:var(--space-6);font-size:var(--text-sm);color:var(--color-text-muted)}
.disclaimer strong{color:var(--color-text)}

/* ---------- Page header (interior) ---------- */
.page-head{position:relative;padding-block:clamp(var(--space-16),10vw,var(--space-24)) clamp(var(--space-10),6vw,var(--space-16));border-bottom:1px solid var(--color-divider);overflow:hidden}
.page-head .grid-overlay{mask-image:radial-gradient(closest-side at 85% 30%, black, transparent 95%)}
.page-head h1{font-size:var(--text-2xl);max-width:20ch;margin-bottom:var(--space-5)}
.page-head .lede{max-width:60ch}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(0.16,1,0.3,1),transform .7s cubic-bezier(0.16,1,0.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr;gap:var(--space-8)}
  .doors{grid-template-columns:1fr}
  .chain{grid-template-columns:1fr;gap:var(--space-3)}
  .chain-arrow{transform:rotate(90deg);padding:var(--space-1)}
  .vs{grid-template-columns:1fr}
  .trl{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav{display:none}
  .nav.open{display:flex;position:absolute;top:4.25rem;left:0;right:0;flex-direction:column;background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:var(--space-6);gap:var(--space-4);margin-left:0}
  .menu-btn{display:grid}
  .cta-band .inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .disclose .col-say{width:auto}
  .hero-cta .btn{flex:1;justify-content:center}
}

/* ============================================================
   SLIDESHOW (landing hero)
   ============================================================ */
.showcase{position:relative;min-height:88vh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;border-bottom:1px solid var(--color-divider)}
.slideshow{position:absolute;inset:0;z-index:0}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s cubic-bezier(0.16,1,0.3,1);transform:scale(1.06)}
.slide.active{opacity:1;transform:scale(1);transition:opacity 1.1s ease, transform 6.5s ease}
.slide img{width:100%;height:100%;object-fit:cover}
.slide::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg, rgba(8,11,12,0.55) 0%, rgba(8,11,12,0.15) 38%, rgba(8,11,12,0.72) 78%, rgba(8,11,12,0.94) 100%),
  linear-gradient(90deg, rgba(8,11,12,0.7) 0%, transparent 55%);}
[data-theme='light'] .slide::after{background:
  linear-gradient(180deg, rgba(238,241,241,0.35) 0%, rgba(238,241,241,0.05) 38%, rgba(238,241,241,0.6) 78%, rgba(238,241,241,0.92) 100%),
  linear-gradient(90deg, rgba(238,241,241,0.6) 0%, transparent 55%);}

.showcase-inner{position:relative;z-index:2;width:min(100% - 2.5rem, var(--content-wide));margin-inline:auto;padding-block:var(--space-16) var(--space-12)}
.showcase-eyebrow{color:var(--color-primary)}
.showcase h1{font-size:var(--text-3xl);max-width:15ch;margin-bottom:var(--space-5);color:var(--color-text)}
.showcase .lede{max-width:52ch;color:var(--color-text);opacity:.9;margin-bottom:var(--space-8)}
.showcase-cta{display:flex;gap:var(--space-4);flex-wrap:wrap}

/* caption card */
.slide-caption{position:relative;z-index:2;width:min(100% - 2.5rem, var(--content-wide));margin-inline:auto;padding-bottom:var(--space-10)}
.slide-caption .cap-inner{max-width:var(--content-narrow);border-left:2px solid var(--color-primary);padding-left:var(--space-5)}
.slide-caption .cap-k{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:0.18em;text-transform:uppercase;color:var(--color-primary);margin-bottom:var(--space-2)}
.slide-caption [data-cap-title]{font-family:var(--font-display);font-size:var(--text-lg);color:var(--color-text);font-weight:700;margin-bottom:var(--space-1)}
.slide-caption [data-cap-text]{font-size:var(--text-sm);color:var(--color-text-muted)}

/* controls */
.slide-controls{position:absolute;z-index:3;bottom:var(--space-6);right:max(1.25rem, calc((100vw - var(--content-wide))/2 + 1.25rem));display:flex;align-items:center;gap:var(--space-3)}
.slide-dots{display:flex;gap:var(--space-2)}
.slide-dots button{width:26px;height:3px;border-radius:var(--radius-full);background:var(--color-text-faint);opacity:.5}
.slide-dots button.active{background:var(--color-primary);opacity:1;width:40px}
.slide-nav{width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);background:color-mix(in oklab,var(--color-bg) 55%,transparent);backdrop-filter:blur(6px)}
.slide-nav:hover{border-color:var(--color-primary);color:var(--color-primary)}

/* ============================================================
   PERIODIC-TABLE ELEMENT TILES (motif)
   category colors — transition metal, rare earth, precious, metalloid
   ============================================================ */
.elements{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-top:var(--space-8)}
.el{position:relative;width:76px;height:82px;border-radius:var(--radius-sm);border:1px solid;padding:var(--space-2);display:flex;flex-direction:column;justify-content:space-between;background:var(--color-surface)}
.el .z{font-family:var(--font-mono);font-size:0.6rem;color:var(--color-text-faint)}
.el .sym{font-family:var(--font-display);font-size:var(--text-lg);font-weight:700;line-height:1}
.el .nm{font-size:0.6rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:0.04em}
/* categories */
.el.rare{border-color:var(--color-amber);}
.el.rare .sym{color:var(--color-amber)}
.el.rare{background:var(--color-amber-soft)}
.el.trans{border-color:var(--color-primary)}
.el.trans .sym{color:var(--color-primary)}
.el.trans{background:var(--color-primary-glow)}
.el.precious{border-color:#c9a94a}
.el.precious .sym{color:#c9a94a}
.el.precious{background:rgba(201,169,74,0.10)}
.el.metalloid{border-color:#7f9aa0}
.el.metalloid .sym{color:#9fb5ba}

.legend{display:flex;flex-wrap:wrap;gap:var(--space-5);margin-top:var(--space-6)}
.legend span{display:inline-flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--color-text-muted);font-family:var(--font-mono);letter-spacing:0.08em;text-transform:uppercase}
.legend span::before{content:"";width:12px;height:12px;border-radius:3px;border:1px solid}
.legend .l-rare::before{border-color:var(--color-amber);background:var(--color-amber-soft)}
.legend .l-trans::before{border-color:var(--color-primary);background:var(--color-primary-glow)}
.legend .l-precious::before{border-color:#c9a94a;background:rgba(201,169,74,0.12)}
.legend .l-metalloid::before{border-color:#7f9aa0;background:rgba(127,154,160,0.12)}

/* output basket grid */
.basket{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--space-4)}
.basket .b{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5);border-top:2px solid var(--color-primary)}
.basket .b.amberbar{border-top-color:var(--color-amber)}
.basket .b.goldbar{border-top-color:#c9a94a}
.basket .b h4{font-size:var(--text-base);margin-bottom:var(--space-2)}
.basket .b p{font-size:var(--text-sm);color:var(--color-text-muted)}

@media (max-width:900px){
  .showcase{min-height:auto;padding-top:var(--space-12)}
  .showcase-inner{padding-block:var(--space-12) var(--space-8)}
  .slide-controls{position:static;justify-content:flex-start;margin-top:var(--space-6);right:auto}
  .slide-caption{padding-bottom:var(--space-8)}
}