/* ================================================================
   PELLETCORE WWW v09 BILINGUAL — visual system and responsive layout
   Local type system: Manrope, Oswald, Inter and IBM Plex Mono.
   ================================================================ */

/* ---------- Fonts (all local, latin + cyrillic subsets) ---------- */
@font-face{font-family:'Manrope';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/manrope-latin-500-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Manrope';font-weight:600;font-style:normal;font-display:swap;src:url('../fonts/manrope-latin-600-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Manrope';font-weight:700;font-style:normal;font-display:swap;src:url('../fonts/manrope-latin-700-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Manrope';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/manrope-cyrillic-500-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Manrope';font-weight:600;font-style:normal;font-display:swap;src:url('../fonts/manrope-cyrillic-600-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Manrope';font-weight:700;font-style:normal;font-display:swap;src:url('../fonts/manrope-cyrillic-700-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-weight:400;font-style:normal;font-display:swap;src:url('../fonts/inter-latin-400-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/inter-latin-500-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-weight:400;font-style:normal;font-display:swap;src:url('../fonts/inter-cyrillic-400-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Inter';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/inter-cyrillic-500-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'IBM Plex Mono';font-weight:400;font-style:normal;font-display:swap;src:url('../fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-weight:400;font-style:normal;font-display:swap;src:url('../fonts/ibm-plex-mono-cyrillic-400-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'IBM Plex Mono';font-weight:500;font-style:normal;font-display:swap;src:url('../fonts/ibm-plex-mono-cyrillic-500-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:'Oswald';font-weight:700;font-style:normal;font-display:swap;src:url('../fonts/oswald-latin-700-normal.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Oswald';font-weight:700;font-style:normal;font-display:swap;src:url('../fonts/oswald-cyrillic-700-normal.woff2') format('woff2');unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}

/* ---------- Tokens ---------- */
:root{
  /* graphite world */
  --g0:#0D1013;          /* deep neutral graphite */
  --g1:#12161A;          /* dark panel */
  --g2:#171C21;
  --gline:#252B31;
  --gline-soft:#1C2126;
  --dt0:#F2F3F4;--dt1:#C8CCCF;--dt2:#999EA3;--dt3:#60666C;
  /* technical warm white world */
  --w0:#F5F4F0;          /* technical warm white */
  --w1:#EDECe7;
  --wpanel:#FBFAF7;
  --wline:#D9D7CF;--wline-soft:#E5E3DC;
  --ink:#171A1D;--ink2:#4C5157;--ink3:#7E838A;
  /* approved PelletCore turquoise palette */
  --tq:#55BCEB;           /* on dark */
  --tq-deep:#1E97C6;      /* on light */
  --tq-dim:rgba(85,188,235,.55);
  /* stone world — intermediate warm mineral register (01 / 04 / 06) */
  --s0:#E9E3D6;           /* stone base */
  --s1:#E1DACA;           /* stone deep */
  --spanel:#F0EBE0;       /* panel surfaces on stone */
  --sline:#CFC7B4;        /* hairlines on stone */
  --tq-stone:#006B9E;     /* turquoise accent on stone */
  /* type — cyrillic system */
  --disp:'Manrope',Arial,sans-serif;
  --cond:'Oswald','Arial Narrow',sans-serif;
  --cond-w:700;
  --sans:'Inter',Arial,sans-serif;
  --mono:'IBM Plex Mono',Consolas,monospace;
  --pad:clamp(24px,4.5vw,64px);
  --shell:1360px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--g0);color:var(--dt0);font-family:var(--sans);font-size:17px;line-height:1.64;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-wrap:break-word}
/* RU typography: no dictionary hyphenation in russian prose (mechanical
   breaks like «про-изводстве» rejected). overflow-wrap on body remains
   as an emergency guard only. */
img{max-width:100%;height:auto;display:block}
a{color:inherit}
button{font:inherit;cursor:pointer}
::selection{background:rgba(85,188,235,.3)}
.shell{max-width:var(--shell);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* technical register */
.tag{font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--dt3)}
.tag .idx{color:var(--tq)}
.light .tag{color:var(--ink3)}
.light .tag .idx{color:var(--tq-deep)}

/* display register */
.h2{font-family:var(--disp);font-weight:700;font-size:clamp(2rem,4vw,3.4rem);line-height:1.04;letter-spacing:-.025em;margin:0 0 20px}
.lead{font-size:clamp(1rem,1.3vw,1.18rem);line-height:1.6;max-width:62ch;margin:0;color:var(--dt2)}
.light .lead{color:var(--ink2)}
.chapter-head{max-width:880px;margin-bottom:clamp(40px,5vh,64px)}
.chapter-head .tag{display:block;margin-bottom:18px}

/* buttons */
.btn{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;text-decoration:none;border:1px solid var(--dt1);color:var(--dt0);background:transparent;padding:13px 24px;border-radius:2px;transition:.25s}
.btn:hover,.btn:focus-visible{border-color:var(--tq);color:var(--tq)}
.btn-solid{background:var(--tq);border-color:var(--tq);color:#06222F}
.btn-solid:hover,.btn-solid:focus-visible{background:#7BCDF2;border-color:#7BCDF2;color:#06222F}
.light .btn{border-color:var(--ink);color:var(--ink)}
.light .btn:hover{border-color:var(--tq-deep);color:var(--tq-deep)}
.light .btn-solid{background:var(--ink);border-color:var(--ink);color:#fff}
.light .btn-solid:hover{background:var(--tq-deep);border-color:var(--tq-deep)}
a:focus-visible,button:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--tq);outline-offset:2px}

#progress{position:fixed;top:0;left:0;height:2px;width:100%;transform:scaleX(0);transform-origin:0 50%;background:var(--tq);z-index:1200}

/* ---------- header ---------- */
#site-header{position:fixed;inset:0 0 auto 0;height:64px;display:flex;align-items:center;z-index:1100;padding:0 var(--pad);justify-content:space-between;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
#site-header.scrolled{background:rgba(13,16,19,.88);backdrop-filter:blur(14px);border-bottom-color:var(--gline)}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand-logo{display:block;width:200px;height:auto;flex:none}
.brand-word{font-family:var(--disp);font-weight:700;font-size:15.5px;letter-spacing:.14em;color:var(--dt0)}
.brand-word .core{color:var(--tq)}
.hnav{display:flex;gap:24px;align-items:center}
.hnav a.nl{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;text-decoration:none;color:var(--dt2);transition:.2s;padding:6px 0}
.hnav a.nl:hover,.hnav a.nl:focus-visible{color:var(--dt0)}
.hnav a.nl.active{color:var(--tq)}
.language-picker{position:relative;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--dt2)}
.language-picker summary{display:flex;align-items:center;gap:9px;min-width:52px;padding:9px 10px;border:1px solid var(--gline);border-radius:2px;cursor:pointer;list-style:none;transition:border-color .2s,color .2s,background .2s}
.language-picker summary::-webkit-details-marker{display:none}
.language-picker summary::after{content:'';width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.language-picker summary:hover,.language-picker summary:focus-visible,.language-picker[open] summary{border-color:var(--dt3);color:var(--dt0);background:rgba(255,255,255,.035)}
.language-picker[open] summary::after{transform:rotate(225deg) translate(-1px,-1px)}
.language-current{color:var(--tq)}
.language-menu{position:absolute;top:calc(100% + 9px);right:0;z-index:20;display:grid;min-width:168px;padding:6px;background:rgba(13,16,19,.98);border:1px solid var(--gline);box-shadow:0 16px 36px rgba(0,0,0,.28);backdrop-filter:blur(14px)}
.language-menu a{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:11px 12px;color:var(--dt2);text-decoration:none;letter-spacing:.04em;transition:color .2s,background .2s}
.language-menu a:hover,.language-menu a:focus-visible{color:var(--dt0);background:rgba(255,255,255,.045)}
.language-menu a.active{color:var(--dt0)}
.language-menu a.active::before{content:'';position:absolute;left:3px;width:2px;height:18px;background:var(--tq)}
.language-menu small{font:inherit;letter-spacing:.14em;color:var(--tq)}
#nav-toggle{display:none;background:none;border:1px solid var(--gline);color:var(--dt0);width:40px;height:40px;border-radius:2px}
#mobile-nav{position:fixed;inset:64px 0 0 0;background:rgba(13,16,19,.97);z-index:1090;display:flex;flex-direction:column;padding:32px var(--pad);gap:6px;overflow-y:auto}
#mobile-nav[hidden]{display:none}
#mobile-nav a{font-family:var(--mono);font-size:13px;letter-spacing:.2em;text-transform:uppercase;text-decoration:none;color:var(--dt1);padding:14px 0;border-bottom:1px solid var(--gline)}
#mobile-nav a.active{color:var(--tq)}

/* ---------- sections base ---------- */
section{position:relative}
.dark{background:var(--g0);color:var(--dt0)}
.light{background:var(--w0);color:var(--ink)}
/* STONE register: dark ↔ stone/light cuts stay hard (cinematic frame),
   stone ↔ light boundaries are softened with the existing gradient device */
.stone{background:var(--s0)}
.stone .tag .idx{color:var(--tq-stone)}
.stone .principle{border-top-color:var(--sline)}
.stone .principle:last-child{border-bottom-color:var(--sline)}
.stone .principle .id{color:var(--tq-stone)}
.stone .arch-callout{border-top-color:var(--sline)}
.stone .beyond-list li{border-color:var(--sline);background:var(--spanel)}
.stone .beyond-list li.dir{border-color:var(--tq-stone);color:var(--tq-stone)}
.stone .mat-link b{color:var(--tq-stone)}
.stone .strip-item{border-color:var(--sline)}
.stone .strip-item.active{border-color:var(--tq-stone)}
.chapter{padding:clamp(90px,11vh,150px) 0}

/* ================================================================
   HERO — cinematic stage + sparse ambient field
   ================================================================ */
#hero{min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;background:
  radial-gradient(56% 48% at 69% 43%,rgba(85,188,235,.095),transparent 72%),
  radial-gradient(44% 34% at 47% 68%,rgba(85,188,235,.035),transparent 78%),var(--g0)}
#hero .scene{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
/* Hero render position: conveyor intake sits in the free wedge between
   the H1 block and the paragraph; no equipment across H1 letters or the dash.
   Size and compositional weight preserved; tuned per viewport below. */
/* horizontal: image left edge pinned at 550px from viewport left
   (text column is left-anchored, so the clearance to H1/dash stays
   constant across desktop widths): ml = 550px - (100% - 1520px)/2 */
#hero .scene img{width:min(1520px,118%);max-width:none;margin-top:18vh;margin-left:calc(1520px - 50%);filter:drop-shadow(0 50px 70px rgba(0,0,0,.62));opacity:0;transform:translateY(18px) scale(.985);transition:opacity 1.1s ease .15s,transform 1.3s cubic-bezier(.16,1,.3,1) .15s}
body.loaded #hero .scene img{opacity:1;transform:none}
#hero .scene{z-index:1}
#ambient{position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.82}
#hero .scrim{position:absolute;inset:0;z-index:3;background:
  linear-gradient(90deg,rgba(13,16,19,.82),rgba(13,16,19,.34) 46%,transparent 62%),
  linear-gradient(transparent 38%,rgba(13,16,19,.92) 80%);pointer-events:none}
#hero .copy{position:relative;z-index:4;padding:0 var(--pad);max-width:960px}
#hero .copy .tag{display:block;margin-bottom:18px}
#hero h1{font-family:var(--cond);font-weight:var(--cond-w);font-size:clamp(2.2rem,6.2vw,5.4rem);line-height:1.04;letter-spacing:.015em;text-transform:uppercase;margin:0;color:var(--dt0)}
#hero h1 .core{color:var(--tq)}
#hero .sub{margin:20px 0 26px;color:var(--dt1);font-size:clamp(1rem,1.35vw,1.2rem);max-width:52ch}
#hero .actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.specbar{position:relative;z-index:4;border-top:1px solid rgba(255,255,255,.14);background:rgba(13,16,19,.55);backdrop-filter:blur(10px)}
.specbar .spec-label{display:block;padding:11px var(--pad) 0;font-family:var(--mono);font-size:8px;font-weight:500;letter-spacing:.3em;text-transform:uppercase;color:var(--dt3)}
.specbar .spec-label + .in{padding-top:7px}
.specbar .in{display:flex;justify-content:space-between;gap:18px;padding:16px var(--pad);flex-wrap:wrap;align-items:center}
.sp{display:flex;align-items:baseline;gap:10px;white-space:nowrap}
.sp .v{font-family:var(--disp);font-weight:700;font-size:1.15rem;letter-spacing:-.015em}
.sp .v .unit{font-size:.66em;font-weight:500;color:var(--dt2)}
.sp .k{font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dt3)}

/* ================================================================
   01 PREMISE — light, editorial asymmetric
   ================================================================ */
#premise .grid{display:grid;grid-template-columns:minmax(280px,5fr) 7fr;gap:clamp(32px,4vw,72px)}
#premise .principles{display:flex;flex-direction:column}
.principle{display:grid;grid-template-columns:110px 1fr;gap:18px;padding:clamp(20px,2.6vh,30px) 0;border-top:1px solid var(--wline)}
.principle:last-child{border-bottom:1px solid var(--wline)}
.principle .id{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--tq-deep);padding-top:5px}
.principle h3{font-family:var(--disp);font-weight:600;font-size:1.2rem;margin:0 0 7px;letter-spacing:-.012em}
.principle p{margin:0;font-size:.93rem;color:var(--ink2);line-height:1.6}

/* ================================================================
   02 THE CORE & CONTROL — dark
   ================================================================ */
#core{background:radial-gradient(56% 50% at 30% 22%,rgba(85,188,235,.07),transparent 70%),var(--g0)}
#core .statement{font-family:var(--cond);font-weight:var(--cond-w);text-transform:uppercase;font-size:clamp(2rem,4.4vw,4rem);line-height:1.06;letter-spacing:.015em;margin:0 0 18px;max-width:24ch}
#core .statement .tqw{color:var(--tq)}
.core-thesis{font-family:var(--mono);font-size:clamp(.8rem,1vw,.92rem);letter-spacing:.08em;color:var(--dt1);border-left:2px solid var(--tq);padding:6px 0 6px 16px;margin:26px 0 0;max-width:52ch}
.core-split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3vw,48px);margin-top:clamp(44px,6vh,72px)}
.core-col{border-top:1px solid var(--gline);padding-top:20px}
.core-col .tag{display:block;margin-bottom:16px}
.core-col ul{list-style:none;margin:0;padding:0}
.core-col li{display:grid;grid-template-columns:22px 1fr;gap:12px;padding:9px 0;font-size:.95rem;color:var(--dt1);border-bottom:1px solid var(--gline-soft)}
.core-col li:last-child{border-bottom:none}
.core-col .bx{font-family:var(--mono);font-size:11px;line-height:1.75}
.col-fixed .bx{color:var(--tq)}
.col-var .bx{color:var(--dt3)}
.core-col li b{color:var(--dt0);font-weight:500}
.core-evidence{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,3vw,48px);margin-top:clamp(48px,7vh,84px);align-items:stretch}
.figure{margin:0;border:1px solid var(--gline);background:var(--g1);border-radius:2px;overflow:hidden;display:flex;flex-direction:column}
.figure .ph{overflow:hidden;flex:1}
.figure img{width:100%;height:100%;object-fit:cover}
.figure figcaption{border-top:1px solid var(--gline);padding:13px 18px;font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--dt2);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.figure figcaption .n{color:var(--tq)}
.fig-die .ph{aspect-ratio:1/1}
.fig-die img{object-position:50% 46%}
.fig-render .ph{aspect-ratio:1/1;background:radial-gradient(60% 55% at 50% 45%,rgba(85,188,235,.09),transparent 72%)}
.fig-render img{object-fit:contain;padding:7%}

/* ---- ch02 photo proof galleries (real photos only, no autoplay) ---- */
.gallery{margin-top:clamp(44px,6vh,76px);min-width:0;max-width:100%}
.control-grid .gallery{margin-top:0}
.control-grid > div{min-width:0}
.g-stage{position:relative;background:var(--g1);border:1px solid var(--gline);border-radius:2px;height:clamp(340px,56vh,600px);display:flex;align-items:center;justify-content:center;overflow:hidden;transition:height .25s ease}
.g-stage img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;cursor:zoom-in}
.g-cap{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:16px 70px 12px 18px;font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--dt1);background:linear-gradient(transparent,rgba(13,16,19,.85) 58%);pointer-events:none}
.g-count{position:absolute;top:12px;right:14px;z-index:2;font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--dt2);background:rgba(13,16,19,.55);padding:5px 9px;border-radius:2px;pointer-events:none}
.g-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:rgba(13,16,19,.62);border:1px solid var(--gline);color:var(--dt0);border-radius:2px;font-family:var(--mono);font-size:15px;line-height:1;transition:.2s}
.g-nav:hover,.g-nav:focus-visible{border-color:var(--tq);color:var(--tq)}
.g-prev{left:12px}.g-next{right:12px}
.g-thumbs{display:flex;gap:8px;margin-top:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin;scrollbar-color:var(--gline) transparent}
.g-thumbs button{flex:0 0 auto;width:104px;height:66px;padding:0;border:1px solid var(--gline);border-radius:2px;overflow:hidden;background:var(--g1);opacity:.6;transition:opacity .2s,border-color .2s}
.g-thumbs button img{width:100%;height:100%;object-fit:cover;display:block}
.g-thumbs button:hover{opacity:.92}
.g-thumbs button.on{opacity:1;border-color:var(--tq)}

/* --- CH02 proof gallery: code-driven stage title slides --- */
.g-title-slide{position:absolute;inset:0;z-index:1;display:flex;flex-direction:column;justify-content:center;padding:clamp(28px,5vw,72px);background:var(--g1)}
.g-title-slide[hidden]{display:none}
.gts-num{font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.3em;text-transform:uppercase;color:var(--tq)}
.gts-rule{display:block;width:60px;height:1px;background:var(--tq);opacity:.55;margin:16px 0 20px}
.gts-title{font-family:var(--disp);font-weight:700;font-size:clamp(1.35rem,2.6vw,2.3rem);line-height:1.08;letter-spacing:-.02em;color:var(--dt0);max-width:22ch}
.gts-sub{display:block;margin-top:16px;font-size:.92rem;line-height:1.6;color:var(--dt2);max-width:52ch}
.g-thumbs button.g-thumb-txt{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-family:var(--mono);color:var(--dt2);background:var(--g1)}
.g-thumbs button.g-thumb-txt .tt-num{font-size:13px;font-weight:500;letter-spacing:.14em;color:var(--tq)}
.g-thumbs button.g-thumb-txt .tt-lbl{font-size:7px;letter-spacing:.22em;text-transform:uppercase}
.g-thumbs button.g-thumb-txt.on{color:var(--dt0)}
/* stage fades: keep light, respect reduced motion (site handles .rv) */
.g-main,.g-title-slide{transition:opacity .25s ease}
@media (prefers-reduced-motion:reduce){
  .g-main,.g-title-slide{transition:none}
}
@media (max-width:920px){
  .gts-title{font-size:1.3rem;max-width:100%;padding-right:64px;padding-left:48px;overflow-wrap:break-word;hyphens:none}
  .gts-sub{font-size:.86rem;padding-right:48px;padding-left:48px}
}
.g-lightbox{position:fixed;inset:0;z-index:1300;background:rgba(9,11,13,.96);display:flex;align-items:center;justify-content:center}
.g-lightbox[hidden]{display:none}
.g-lightbox img{max-width:92vw;max-height:84vh;object-fit:contain;cursor:default}
.g-lightbox .g-cap{position:fixed;padding:18px 70px;text-align:center;background:linear-gradient(transparent,rgba(9,11,13,.92) 60%)}
.g-lightbox .g-close{position:fixed;top:16px;right:16px;z-index:4;width:44px;height:44px;background:rgba(13,16,19,.62);border:1px solid var(--gline);color:var(--dt0);border-radius:2px;font-size:14px}
.g-lightbox .g-close:hover,.g-lightbox .g-close:focus-visible{border-color:var(--tq);color:var(--tq)}
.g-lightbox .g-prev{left:16px}.g-lightbox .g-next{right:16px}

/* control block */
.control{margin-top:clamp(56px,8vh,96px);border-top:1px solid var(--gline);padding-top:clamp(40px,6vh,64px)}
.control .h2{max-width:22ch}
.control-grid{display:grid;grid-template-columns:minmax(300px,5fr) 7fr;gap:clamp(28px,3.6vw,60px);margin-top:clamp(32px,4vh,48px)}
.control-list{list-style:none;margin:0;padding:0}
.control-list li{display:grid;grid-template-columns:22px 1fr;gap:12px;padding:10px 0;font-size:.94rem;color:var(--dt1);border-top:1px solid var(--gline-soft)}
.control-list li:last-child{border-bottom:1px solid var(--gline-soft)}
.control-list .bx{color:var(--tq);font-family:var(--mono);font-size:11px;line-height:1.75}
.control-list b{color:var(--dt0);font-weight:500}
.control-figs{display:grid;grid-template-rows:auto auto;gap:clamp(16px,2vw,24px)}
.fig-cabinets .ph{aspect-ratio:16/10}
.fig-cabinets img{object-position:50% 38%}
.fig-wiring .ph{aspect-ratio:21/7}
.fig-wiring img{object-position:50% 42%}
.control-note{margin-top:14px;font-size:.83rem;color:var(--dt3);max-width:70ch;line-height:1.6}

/* ================================================================
   03 PROCESS LINE — light scrollytelling
   ================================================================ */
#process .flow-wrap{position:relative}
#process .sticky-stage{position:sticky;top:64px;z-index:6;padding:12px 0 18px;background:linear-gradient(var(--w0) 82%,rgba(245,244,240,0))}
#process .stage-band{position:relative;border:1px solid var(--wline);background:var(--wpanel);border-radius:2px;overflow:hidden;box-shadow:0 18px 40px rgba(23,26,29,.08)}
/* concept A: the whole two-module line stays visible as a living map;
   the active phase zone is highlighted, nothing pans or crops */
#process .stage-fig{position:relative;width:fit-content;max-width:100%;margin:0 auto;padding:10px 0 4px}
#process .stage-fig img{height:min(44vh,440px);width:auto;max-width:100%;object-fit:contain;display:block}
.st-zone{position:absolute;left:var(--zx);top:var(--zy);width:var(--zw);height:var(--zh);border:2px solid transparent;border-radius:4px;pointer-events:none;transition:border-color .35s,background-color .35s,box-shadow .35s}
.st-zone i{position:absolute;top:-1px;left:-1px;font-style:normal;font-family:var(--mono);font-size:9px;font-weight:500;letter-spacing:.14em;padding:3px 7px;border-radius:3px 0 3px 0;background:var(--tq-deep);color:#fff;opacity:0;transition:opacity .35s}
.st-zone.on{border-color:var(--tq-deep);background:rgba(30,151,198,.06);box-shadow:0 0 0 4px rgba(30,151,198,.07)}
.st-zone.on i{opacity:1}
/* static map (mobile / reduced motion): all zones outlined, sequence readable */
.st-static .st-zone{border-color:var(--sline)}
.st-static .st-zone i{opacity:1;background:var(--ink3)}
.st-static .st-zone.on{border-color:var(--tq-deep)}
.st-static .st-zone.on i{background:var(--tq-deep)}
#process .stage-hud{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:12px 18px;border-top:1px solid var(--wline);flex-wrap:wrap;background:var(--wpanel)}
#process .stage-hud .phase{font-family:var(--disp);font-weight:700;font-size:1.05rem;letter-spacing:-.01em}
#process .stage-hud .mod{font-family:var(--mono);font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink3)}
#process .railbar{position:relative;height:3px;background:var(--wline);flex:1;min-width:140px;border-radius:2px}
#process .railbar .fill{position:absolute;inset:0 auto 0 0;width:0;background:var(--tq-deep);border-radius:2px}
#process .railbar .dot{position:absolute;top:50%;left:0;width:11px;height:11px;border-radius:50%;background:var(--tq-deep);transform:translate(-50%,-50%);box-shadow:0 0 0 3px rgba(30,151,198,.2)}
#process .phase-steps{position:relative;z-index:2}
/* phase intervals: text + ghost phase numeral filling the right field */
.phase-block{min-height:58vh;display:flex;align-items:center;justify-content:space-between;gap:clamp(24px,4vw,72px);padding-top:4vh}
.phase-num{flex:0 0 auto;font-family:var(--disp);font-weight:700;font-size:clamp(8rem,24vh,14rem);line-height:1;letter-spacing:-.04em;color:rgba(23,26,29,.06);font-variant-numeric:tabular-nums;user-select:none;pointer-events:none}
.phase-inner{max-width:600px;background:transparent;padding:8px 0}
.phase-inner .tag{display:block;margin-bottom:14px}
.phase-inner h3{font-family:var(--disp);font-weight:700;font-size:clamp(1.5rem,2.6vw,2.2rem);letter-spacing:-.02em;margin:0 0 10px}
.phase-inner p{margin:0 0 14px;font-size:.97rem;color:var(--ink2);line-height:1.62}
.phase-inner .stations{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3);line-height:2}
.phase-inner .stations .cu{color:var(--tq-deep)}
/* all-14 accordion */
.detail-layer{margin-top:clamp(30px,4vh,48px);border:1px solid var(--wline);background:var(--wpanel);border-radius:2px}
.detail-layer summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px;padding:18px 24px;font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink2)}
.detail-layer summary::-webkit-details-marker{display:none}
.detail-layer summary .pm::after{content:'+';color:var(--tq-deep);font-size:15px}
.detail-layer[open] summary .pm::after{content:'–'}
.detail-cols{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--wline)}
.detail-col{padding:6px 0 14px}
.detail-col + .detail-col{border-left:1px solid var(--wline-soft)}
.detail-col h4{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink3);margin:12px 24px 6px}
.detail-col ol{list-style:none;margin:0;padding:0}
.detail-col li{display:grid;grid-template-columns:44px 1fr;gap:10px;padding:8px 24px;font-size:.88rem}
.detail-col li+li{border-top:1px solid var(--wline-soft)}
.detail-col .num{font-family:var(--mono);font-size:10px;color:var(--ink3)}
.detail-col li.is-key-stage .num{color:var(--tq-deep)}
.detail-col li.is-key-stage{background:rgba(30,151,198,.05)}
.detail-col .n{font-weight:500}
.detail-col .r{display:block;font-size:.8rem;color:var(--ink3)}

/* ================================================================
   04 ARCHITECTURE — single approved render
   ================================================================ */
#architecture{background:linear-gradient(var(--w0),var(--s0) 12%,var(--s0) 88%,var(--wpanel))}
.arch-viewer{max-width:1080px;margin:clamp(24px,3vw,44px) auto 0}
.arch-stage{position:relative;height:clamp(500px,52vw,720px);margin:0;overflow:hidden;isolation:isolate}
.arch-view{position:absolute;inset:0;margin:0;display:grid;place-items:center}
.arch-view img{width:100%;height:100%;object-fit:contain;box-sizing:border-box;padding:clamp(12px,1.8vw,24px);filter:none!important;box-shadow:none!important}
.arch-state{position:absolute;left:50%;bottom:0;z-index:4;transform:translateX(-50%);display:flex;align-items:center;gap:18px;font-family:var(--mono);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--dt2);white-space:nowrap}
.arch-callouts{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3.4vw,52px);max-width:1080px;margin:clamp(26px,3vw,40px) auto 0}
.arch-callout{border-top:1px solid var(--wline);padding-top:16px}
.arch-callout .tag{display:block;margin-bottom:8px}
.arch-callout h3{font-family:var(--disp);font-weight:600;font-size:1.2rem;margin:0 0 6px;letter-spacing:-.012em}
.arch-callout p{margin:0;font-size:.9rem;color:var(--ink2);line-height:1.6}
.beyond{max-width:1080px;margin:clamp(44px,6vh,72px) auto 0;display:grid;grid-template-columns:minmax(240px,4fr) 8fr;gap:clamp(28px,4vw,64px)}
.beyond h3{font-family:var(--disp);font-weight:700;font-size:clamp(1.4rem,2.3vw,1.9rem);letter-spacing:-.02em;line-height:1.1;margin:0;max-width:15ch}
.beyond-list{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none}
.beyond-list li{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink2);border:1px solid var(--wline);background:transparent;padding:9px 15px;border-radius:2px;cursor:default;transition:none;user-select:text}
.beyond-dir{margin:20px 0 0;padding:4px 0 4px 14px;border-left:2px solid var(--tq-deep);font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--tq-deep)}
.beyond-note{margin:16px 0 0;font-size:.84rem;color:var(--ink3);max-width:64ch}

/* ================================================================
   05 ENVELOPE — warm white, odometer numbers
   ================================================================ */
#envelope{background:var(--w0)}
.env-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(30px,4vw,60px) clamp(26px,3.4vw,52px)}
.env-cell{border-top:1px solid var(--wline);padding-top:16px}
.env-cell .tag{display:block;margin-bottom:12px}
.env-value{font-family:var(--disp);font-weight:700;font-size:clamp(2.3rem,4.2vw,3.7rem);letter-spacing:-.03em;line-height:1;white-space:nowrap;font-variant-numeric:tabular-nums}
.env-value .unit{font-size:.42em;font-weight:500;color:var(--ink3)}
.env-desc{margin-top:10px;font-size:.86rem;color:var(--ink3);line-height:1.55;max-width:30ch}
.env-foot{margin-top:clamp(32px,4vh,48px);font-size:.85rem;color:var(--ink3);max-width:78ch;line-height:1.6}

/* ================================================================
   06 FEEDSTOCK — compact editorial filmstrip
   ================================================================ */
/* 06 stone island between light 05 and light 07: soft entry/exit */
#feedstock{background:linear-gradient(var(--wpanel),var(--s0) 12%,var(--s0) 88%,var(--w0))}
.strip{display:flex;gap:10px;min-height:420px}
.strip-item{position:relative;flex:1;min-width:0;border:1px solid var(--wline);border-radius:2px;overflow:hidden;background:#101314;padding:0;text-align:left;transition:flex .55s cubic-bezier(.16,1,.3,1),border-color .3s;display:flex;flex-direction:column;justify-content:flex-end}
.strip-item img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.16,1,.3,1);opacity:.94}
.strip-item::after{content:'';position:absolute;inset:auto 0 0 0;height:72%;background:linear-gradient(transparent,rgba(10,12,13,.9));pointer-events:none}
.strip-item .si{position:relative;z-index:2;padding:20px 22px;color:#F2F3F4}
.strip-item .si .name{font-family:var(--disp);font-weight:600;font-size:1.15rem;letter-spacing:-.01em;display:block}
.strip-item .si .apps{font-family:var(--mono);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--tq);display:block;margin-top:5px}
.strip-item .si .det{max-height:0;overflow:hidden;opacity:0;transition:max-height .55s cubic-bezier(.16,1,.3,1),opacity .4s .1s}
.strip-item .si .det .form{display:block;margin-top:12px;padding-top:10px;border-top:1px solid rgba(255,255,255,.14);font-size:.84rem;color:#D8DBDD;line-height:1.5}
.strip-item .si .det .dir{display:block;margin:8px 0 0;font-size:.8rem;color:#A8ADB1;line-height:1.5}
.strip-item.active{flex:2.6;border-color:var(--tq-deep)}
.strip-item.active img{transform:scale(1.04)}
.strip-item.active .si .det{max-height:260px;opacity:1}
.mat-link{margin-top:22px;font-size:.9rem;color:var(--ink2);max-width:74ch}
.mat-link b{color:var(--tq-deep);font-weight:500}

/* ================================================================
   07 APPLICATIONS — neutral editorial rows
   ================================================================ */
#applications{background:var(--w0)}
.app-rows{border-top:1px solid var(--wline)}
.app-row{display:grid;grid-template-columns:120px minmax(160px,3fr) 6fr 4fr;gap:clamp(16px,2.4vw,40px);padding:clamp(22px,3vh,34px) 0;border-bottom:1px solid var(--wline);align-items:baseline}
.app-row .id{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--tq-deep)}
.app-row h3{font-family:var(--disp);font-weight:700;font-size:clamp(1.3rem,2.2vw,1.8rem);letter-spacing:-.018em;margin:0}
.app-row p{margin:0;font-size:.92rem;color:var(--ink2);line-height:1.6}
.app-row .fl{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3);line-height:1.9}
.app-row .fl .arr{color:var(--tq-deep)}
.apps-foot{margin-top:22px;font-size:.85rem;color:var(--ink3);max-width:78ch;line-height:1.6}

/* ================================================================
   08 DELIVERY & PROOF — dark
   ================================================================ */
#delivery{background:var(--g0)}
.tl{margin-top:clamp(44px,7vh,80px)}
.tl-track{position:relative;height:1px;background:var(--gline)}
.tl-fill{position:absolute;inset:0 auto 0 0;width:0;background:var(--tq);transition:width 1.1s cubic-bezier(.16,1,.3,1)}
.tl-nodes{display:grid;grid-template-columns:repeat(8,1fr);gap:clamp(12px,1.25vw,20px);margin:0;padding:0;list-style:none}
.tl-node{position:relative;padding-top:26px;opacity:.38;transform:translateY(10px);transition:opacity .6s ease,transform .6s cubic-bezier(.16,1,.3,1)}
.tl-node::before{content:'';position:absolute;top:-5px;left:0;width:9px;height:9px;background:var(--g0);border:1px solid var(--dt3);transform:rotate(45deg);transition:background .4s,border-color .4s}
.tl-node.on{opacity:1;transform:none}
.tl-node.on::before{background:var(--tq);border-color:var(--tq)}
.tl-num{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--dt3);transition:color .4s}
.tl-node.on .tl-num{color:var(--tq)}
.tl-node h3{font-family:var(--mono);font-weight:500;font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--dt0);margin:10px 0 8px;line-height:1.5}
.tl-node p{margin:0;font-size:.82rem;color:var(--dt2);line-height:1.6;max-width:24ch}
/* final proof scene */
.steel{position:relative;margin-top:clamp(56px,8vh,96px);min-height:82vh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;border:1px solid var(--gline);border-radius:2px}
.steel .scene{position:absolute;inset:0}
.steel .scene img{width:158%;max-width:none;height:100%;object-fit:cover;object-position:0% 55%}
.steel .scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,16,19,.5),transparent 55%),linear-gradient(transparent 42%,rgba(13,16,19,.9) 82%)}
.steel .copy{position:relative;z-index:3;padding:0 clamp(24px,3.6vw,52px) clamp(30px,4.6vh,48px);max-width:820px}
.steel .copy .tag{display:block;margin-bottom:12px}
.steel h3{font-family:var(--cond);font-weight:var(--cond-w);text-transform:uppercase;font-size:clamp(1.8rem,4vw,3.4rem);line-height:1.06;letter-spacing:.015em;margin:0 0 12px}
.steel p{margin:0;color:var(--dt1);font-size:clamp(.95rem,1.25vw,1.12rem);max-width:54ch}
.steel .figcap{position:absolute;right:20px;bottom:16px;z-index:3;font-family:var(--mono);font-size:8.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--dt2)}

/* ================================================================
   09 MATERIAL-FIRST PROJECT BRIEF
   ================================================================ */
#start{background:radial-gradient(64% 56% at 82% 100%,rgba(85,188,235,.09),transparent 62%),#0A0D0F}
.start-head{max-width:860px;margin-bottom:clamp(46px,7vh,78px)}
.start-head>.tag{display:block;margin-bottom:18px}
.start-head h2{font-family:var(--disp);font-weight:700;font-size:clamp(2rem,4.2vw,3.5rem);line-height:1.04;letter-spacing:-.026em;margin:0 0 20px}
.start-contact{margin:16px 0 0;color:var(--dt2);font-size:.92rem;line-height:1.6}
.start-contact a{color:var(--tq);border-bottom:1px solid rgba(85,188,235,.45);padding-bottom:1px}
.start-contact a:hover,.start-contact a:focus-visible{color:var(--dt0);border-bottom-color:var(--tq)}
.project-builder{display:grid;grid-template-columns:minmax(0,1.32fr) minmax(360px,.68fr);gap:clamp(34px,5vw,72px);align-items:start}
.brief-steps{min-width:0}
.brief-step{padding:0 0 clamp(34px,5vh,54px);margin:0 0 clamp(34px,5vh,54px);border-bottom:1px solid var(--gline)}
.brief-step[hidden]{display:none}
.brief-step:last-child{margin-bottom:0}
.step-head{display:grid;grid-template-columns:44px 1fr;gap:16px;align-items:start;margin-bottom:22px}
.step-num{font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--tq);padding-top:5px}
.step-kicker{display:block;font-family:var(--mono);font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:var(--dt3);margin-bottom:6px}
.step-head h3{font-family:var(--disp);font-weight:600;font-size:clamp(1.25rem,2vw,1.65rem);line-height:1.25;letter-spacing:-.015em;margin:0}
.choice-grid{display:grid;gap:10px;padding-left:60px}
.material-choices{grid-template-columns:repeat(2,minmax(0,1fr))}
.choice-grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.choice-grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.choice-card{position:relative;min-width:0;border:1px solid var(--gline);border-radius:2px;background:var(--g1);color:var(--dt0);text-align:left;padding:0;overflow:hidden;transition:border-color .25s,background .25s,transform .25s}
.choice-card:hover,.choice-card:focus-visible{border-color:var(--dt3);background:var(--g2)}
.choice-card[aria-pressed="true"]{border-color:var(--tq);background:rgba(85,188,235,.08)}
.choice-card[aria-pressed="true"]::after{content:'';position:absolute;top:10px;right:10px;width:8px;height:8px;background:var(--tq);transform:rotate(45deg)}
.choice-visual{display:grid;grid-template-columns:108px 1fr;align-items:center;min-height:86px}
.choice-visual img{width:108px;height:86px;object-fit:cover;opacity:.78;transition:opacity .25s,transform .45s}
.choice-visual:hover img,.choice-visual[aria-pressed="true"] img{opacity:1;transform:scale(1.03)}
.choice-visual>span{font-family:var(--disp);font-weight:600;font-size:.95rem;line-height:1.3;padding:14px 18px}
.choice-text{display:flex;flex-direction:column;min-height:98px;padding:18px 20px}
.choice-text strong{font-family:var(--disp);font-weight:600;font-size:1rem;line-height:1.35}
.choice-text>span{margin-top:7px;font-size:.78rem;line-height:1.45;color:var(--dt2)}
.moisture-exact{margin:14px 0 0 60px;padding:18px 20px;border:1px solid var(--gline);border-left:2px solid var(--tq);background:rgba(85,188,235,.045)}
.moisture-exact[hidden]{display:none}
.moisture-exact label{display:block;margin-bottom:10px;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dt2)}
.moisture-input-wrap{display:flex;align-items:center;width:min(220px,100%);border:1px solid var(--gline);background:var(--g1);transition:border-color .2s}
.moisture-input-wrap:focus-within{border-color:var(--tq)}
.moisture-input-wrap input{min-width:0;width:100%;border:0;background:transparent;color:var(--dt0);padding:11px 12px;font-family:var(--disp);font-size:1rem;outline:0}
.moisture-input-wrap>span{padding:0 13px 0 4px;font-family:var(--mono);font-size:10px;color:var(--tq)}
.moisture-exact p{margin:9px 0 0;font-size:.76rem;line-height:1.45;color:var(--dt3)}
.moisture-exact.is-invalid{border-left-color:#e7a85e}
.moisture-exact.is-invalid p{color:#e7a85e}
.notes-field{display:block;padding-left:60px;margin-bottom:9px;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--dt3)}
#brief-notes{display:block;width:calc(100% - 60px);margin-left:60px;min-height:112px;resize:vertical;background:var(--g1);border:1px solid var(--gline);border-radius:2px;color:var(--dt0);padding:14px 16px;font-family:var(--sans);font-size:.92rem;line-height:1.55}
.project-passport{position:sticky;top:92px;border:1px solid var(--gline);background:rgba(18,22,26,.92);backdrop-filter:blur(14px);border-radius:2px;padding:clamp(22px,2.4vw,32px)}
.project-passport>.tag{display:block;margin-bottom:20px}
.project-passport dl{margin:0;border-top:1px solid var(--gline)}
.project-passport dl>div{display:grid;grid-template-columns:minmax(116px,.7fr) 1.3fr;gap:18px;padding:13px 0;border-bottom:1px solid var(--gline-soft);transition:background .3s}
.project-passport dl>div.changed{background:rgba(85,188,235,.06)}
.project-passport dt{font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dt3)}
.project-passport dd{margin:0;font-size:.86rem;line-height:1.45;color:var(--dt1)}
.passport-status{margin:20px 0 0;padding:12px 0 12px 14px;border-left:2px solid var(--gline);font-size:.82rem;line-height:1.55;color:var(--dt2)}
.passport-status.complete{border-left-color:var(--tq);color:var(--dt1)}
.brief-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.brief-actions .btn{flex:1 1 180px;text-align:center;padding-left:14px;padding-right:14px}
.btn:disabled{cursor:not-allowed;opacity:.35}
.btn:disabled:hover{border-color:var(--dt1);color:var(--dt0);background:transparent}
.btn-solid:disabled:hover{background:var(--tq);border-color:var(--tq);color:#06222F}
.copy-status{display:block;min-height:1.4em;margin-top:10px;font-family:var(--mono);font-size:8.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--tq)}

/* footer */
footer{background:#080B0D;border-top:1px solid var(--gline)}
.footer-grid{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;padding:clamp(34px,5vh,52px) var(--pad);max-width:var(--shell);margin:0 auto}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.footer-brand .brand-logo{width:220px;height:auto}
.footer-brand .sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--dt3);display:block;margin-top:4px}
.footer-meta{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dt3);text-align:right;line-height:2.1}
.footer-meta a{color:var(--dt2);text-decoration:none;border-bottom:1px solid var(--gline)}
.footer-meta a:hover{color:var(--tq)}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}
.rv.on{opacity:1;transform:none}
.rv-d1{transition-delay:.08s}.rv-d2{transition-delay:.16s}.rv-d3{transition-delay:.24s}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .rv{opacity:1;transform:none}
  #hero .scene img{opacity:1;transform:none}
  #ambient{opacity:.62}
}

html.no-motion .rv{opacity:1;transform:none}
html.no-motion #hero .scene img{opacity:1;transform:none}

/* ---------- responsive ---------- */
/* 1366-class screens retain the approved text/render clearance. */
@media (max-width:1380px) and (min-width:921px){
  #hero .scene img{margin-left:calc(1552px - 50%)}
}
@media (max-width:1100px){
  .hnav{gap:16px}
  .hnav a.nl{display:none}
  #nav-toggle{display:block}
  .brand-logo{width:180px}
  .proof-grid{grid-template-columns:1fr 1fr}
  .tl-track{position:absolute;left:4px;top:0;bottom:0;width:1px;height:auto}
  .tl-fill{inset:0 0 auto 0;width:1px;height:0;transition:height 1.1s cubic-bezier(.16,1,.3,1)}
  .tl{position:relative}
  .tl-nodes{grid-template-columns:1fr;gap:26px;padding-left:28px}
  .tl-node{padding-top:0}
  .tl-node::before{top:4px;left:-28px}
  .tl-node p{max-width:none}
}
@media (max-width:920px){
  .brand-logo{width:155px}
  .hnav{gap:12px}
  .hnav .nav-consult{display:none}
  .language-picker{font-size:9px}
  .language-picker summary{min-width:48px;padding:8px 9px}
  #hero{min-height:100svh}
  /* Mobile render position: machine sinks to the lower-right, H1 and
     most of the paragraph stay clear; remaining contact is dimmed by scrim */
  #hero .scene img{width:150%;margin-left:25%;margin-top:34vh}
  #premise .grid,.core-split,.core-evidence,.control-grid,.arch-callouts,.beyond,.service-facts{grid-template-columns:1fr}
  .env-grid{grid-template-columns:1fr 1fr}
  .detail-cols{grid-template-columns:1fr}
  .detail-col + .detail-col{border-left:none;border-top:1px solid var(--wline-soft)}
  /* scrolly simplified: static stage, stacked phases */
  #process .sticky-stage{position:static;height:auto;pointer-events:auto}
  #process .stage-hud .railbar,#process .stage-hud .dot{display:none}
  .phase-block{min-height:0;padding:26px 0}
  .phase-num{display:none}
  #process .stage-fig img{height:auto;width:100%}
  .strip{flex-direction:column;min-height:0}
  .strip-item{min-height:150px;flex:none}
  .strip-item.active{flex:none}
  .strip-item.active .si .det{max-height:300px}
  .arch-stage{height:clamp(330px,72vw,520px)}
  .arch-state{bottom:2px}
  .app-row{grid-template-columns:64px 1fr;grid-template-rows:auto auto auto;row-gap:8px}
  .app-row h3{grid-column:2}
  .app-row p{grid-column:1/3}
  .app-row .fl{grid-column:1/3}
  .fig-wiring .ph{aspect-ratio:16/7}
  .g-stage{height:min(52vh,430px)}
  .g-nav{width:36px;height:36px}
  .g-prev{left:8px}.g-next{right:8px}
  .g-thumbs button{width:84px;height:56px}
  .g-cap{padding:14px 14px 10px}
  .steel .scene img{width:200%}
  .project-builder{grid-template-columns:1fr;gap:32px}
  .project-passport{position:static;order:2}
  .footer-meta{text-align:left}
}
@media (max-width:560px){
  /* Chapter 01: 01.A–01.C stack vertically — index above heading,
     full available width, separator lines preserved */
  .principle{grid-template-columns:1fr;gap:8px}
  .principle .id{padding-top:0}
  .env-grid{grid-template-columns:1fr}
  #hero .actions .btn{width:100%;text-align:center}
  .arch-stage{height:clamp(300px,84vw,420px);overflow:hidden}
  .arch-state{bottom:13px;max-width:calc(100% - 32px);font-size:8px;gap:10px}
  .choice-grid{padding-left:0}
  .material-choices,.choice-grid-two,.choice-grid-three{grid-template-columns:1fr}
  .choice-visual{grid-template-columns:92px 1fr;min-height:76px}
  .choice-visual img{width:92px;height:76px}
  .choice-text{min-height:0}
  .moisture-exact{margin-left:0;padding:16px}
  .notes-field{padding-left:0}
  #brief-notes{width:100%;margin-left:0}
  .project-passport{padding:22px 18px}
  .project-passport dl>div{grid-template-columns:104px 1fr;gap:12px}
  .brief-actions{flex-direction:column}
  .brief-actions .btn{flex:none;width:100%}
}