/* ============================================================
   ORRERY HOUSE — "Escapement Ivory" design system
   Identity: warm ivory paper, graphite ink, oxidized brass,
   oxblood seal. Marcellus display / Albert Sans body /
   Spline Sans Mono data. Scroll-driven motion + IO fallback.
   All colours OKLCH. One localStorage key: oh-theme.
   ============================================================ */
@font-face{font-family:'Marcellus';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/marcellus-latin.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:'Marcellus';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/marcellus-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Albert Sans';font-style:normal;font-weight:100 900;font-display:swap;src:url('../fonts/albert-latin.woff2') format('woff2-variations');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:'Albert Sans';font-style:italic;font-weight:100 900;font-display:swap;src:url('../fonts/albert-latin.woff2') format('woff2-variations');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:'Albert Sans';font-style:normal;font-weight:100 900;font-display:swap;src:url('../fonts/albert-latin-ext.woff2') format('woff2-variations');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Spline Sans Mono';font-style:normal;font-weight:300 700;font-display:swap;src:url('../fonts/spline-latin.woff2') format('woff2-variations');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:'Spline Sans Mono';font-style:normal;font-weight:300 700;font-display:swap;src:url('../fonts/spline-latin-ext.woff2') format('woff2-variations');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{
  --paper:oklch(0.96 0.012 85);          /* warm ivory */
  --paper-deep:oklch(0.925 0.018 82);    /* aged ivory */
  --ink:oklch(0.24 0.012 250);           /* graphite */
  --ink-soft:oklch(0.38 0.014 250);
  --brass:oklch(0.62 0.105 80);          /* oxidized brass */
  --brass-deep:oklch(0.52 0.095 74);
  --oxblood:oklch(0.45 0.13 25);         /* seal red */
  --line:oklch(0.86 0.02 82);
  --line-strong:oklch(0.72 0.03 82);
  --glass:oklch(0.99 0.005 85);
  --shadow:0 18px 50px oklch(0.24 0.012 250 / .12),0 2px 8px oklch(0.24 0.012 250 / .08);
  --font-display:'Marcellus',Georgia,serif;
  --font-body:'Albert Sans',system-ui,sans-serif;
  --font-mono:'Spline Sans Mono',ui-monospace,monospace;
  --step--1:clamp(.82rem,.78rem + .2vw,.9rem);
  --step-0:clamp(1rem,.95rem + .25vw,1.09rem);
  --step-1:clamp(1.2rem,1.1rem + .5vw,1.4rem);
  --step-2:clamp(1.5rem,1.3rem + 1vw,1.9rem);
  --step-3:clamp(2rem,1.6rem + 2vw,3rem);
  --step-4:clamp(2.6rem,1.9rem + 3.6vw,4.6rem);
  --step-5:clamp(3.2rem,2rem + 6vw,6.4rem);
  --space-1:.5rem;--space-2:1rem;--space-3:1.75rem;--space-4:3rem;--space-5:5rem;--space-6:8rem;
  --measure:62ch;
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --tick-dur:240ms;
  --radius:3px;
}
[data-theme="nightwork"]{
  --paper:oklch(0.2 0.014 260);
  --paper-deep:oklch(0.17 0.014 260);
  --ink:oklch(0.93 0.01 85);
  --ink-soft:oklch(0.78 0.012 82);
  --brass:oklch(0.75 0.11 82);
  --brass-deep:oklch(0.63 0.1 76);
  --oxblood:oklch(0.66 0.12 28);
  --line:oklch(0.32 0.02 260);
  --line-strong:oklch(0.45 0.025 260);
  --glass:oklch(0.24 0.016 260);
  --shadow:0 18px 50px oklch(0.05 0.01 260 / .5),0 2px 8px oklch(0.05 0.01 260 / .4);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html:focus-within{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-weight:400;line-height:1.65;font-size:var(--step-0);-webkit-font-smoothing:antialiased;transition:background-color .45s var(--ease-out),color .45s var(--ease-out)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brass-deep);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--oxblood)}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;line-height:1.12;margin:0 0 var(--space-2);letter-spacing:.01em}
h1{font-size:var(--step-4)}
h2{font-size:var(--step-3)}
h3{font-size:var(--step-2)}
p{max-width:var(--measure)}
.container{width:min(1160px,92vw);margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--oxblood);color:#fff;padding:.6rem 1rem;z-index:200;border-radius:0 0 var(--radius) 0}
.skip-link:focus{left:0}
:focus-visible{outline:2px solid var(--oxblood);outline-offset:3px;border-radius:2px}
.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}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in oklab,var(--paper) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:var(--space-3);padding:.7rem 0}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}
.brand svg{width:34px;height:34px}
.brand-name{font-family:var(--font-display);font-size:1.25rem;letter-spacing:.06em}
.brand-est{font-family:var(--font-mono);font-size:.62rem;color:var(--ink-soft);letter-spacing:.14em;text-transform:uppercase}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;gap:1.4rem;list-style:none;margin:0;padding:0}
.main-nav a{color:var(--ink);text-decoration:none;font-size:var(--step--1);letter-spacing:.04em;text-transform:uppercase;padding:.4rem 0;position:relative}
.main-nav a::after{content:"";position:absolute;left:0;bottom:0;height:1.5px;width:100%;background:var(--brass);transform:scaleX(0);transform-origin:left;transition:transform var(--tick-dur) var(--ease-out)}
.main-nav a:hover::after,.main-nav a[aria-current="page"]::after{transform:scaleX(1)}
.main-nav a[aria-current="page"]{color:var(--oxblood)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line-strong);border-radius:var(--radius);padding:.45rem .7rem;font:inherit;color:var(--ink);cursor:pointer}
.theme-toggle{background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:.45rem .85rem;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;color:var(--ink);cursor:pointer;transition:border-color var(--tick-dur),color var(--tick-dur)}
.theme-toggle:hover{border-color:var(--brass);color:var(--brass-deep)}

/* ---------- footer ---------- */
.site-footer{margin-top:var(--space-6);border-top:1px solid var(--line);background:var(--paper-deep);padding:var(--space-4) 0 var(--space-3)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-3)}
.footer-grid h4{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft)}
.footer-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}
.footer-grid a{color:var(--ink);text-decoration:none}
.footer-grid a:hover{color:var(--brass-deep);text-decoration:underline}
.footer-note{margin-top:var(--space-3);font-size:var(--step--1);color:var(--ink-soft);border-top:1px solid var(--line);padding-top:var(--space-2);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}

/* ---------- buttons & forms ---------- */
.btn{display:inline-block;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;text-decoration:none;padding:.8rem 1.5rem;border-radius:var(--radius);border:1px solid var(--ink);color:var(--ink);background:transparent;cursor:pointer;transition:background-color var(--tick-dur) var(--ease-out),color var(--tick-dur),transform var(--tick-dur) var(--ease-spring)}
.btn:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-solid{background:var(--oxblood);border-color:var(--oxblood);color:#fff}
.btn-solid:hover{background:var(--oxblood);filter:brightness(1.1);color:#fff}
.btn[aria-disabled="true"],.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
form{display:grid;gap:1rem}
.field{display:grid;gap:.35rem}
label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft)}
input,select,textarea{font:inherit;color:var(--ink);background:var(--glass);border:1px solid var(--line-strong);border-radius:var(--radius);padding:.7rem .9rem;transition:border-color var(--tick-dur),box-shadow var(--tick-dur)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brass-deep);box-shadow:0 0 0 3px color-mix(in oklab,var(--brass) 25%,transparent)}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:var(--oxblood)}
.error-msg{color:var(--oxblood);font-size:var(--step--1);display:none}
.error-msg[data-show]{display:block}
.demo-note{font-size:var(--step--1);color:var(--ink-soft);border-left:3px solid var(--brass);padding:.4rem .8rem;background:color-mix(in oklab,var(--brass) 8%,transparent)}
.toast{position:fixed;bottom:1.2rem;left:50%;transform:translate(-50%,140%);background:var(--ink);color:var(--paper);padding:.8rem 1.4rem;border-radius:var(--radius);font-size:var(--step--1);z-index:300;transition:transform .4s var(--ease-spring);max-width:92vw;text-align:center}
.toast.show{transform:translate(-50%,0)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:var(--space-5) 0 var(--space-4);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:var(--space-4);align-items:center}
.kicker{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--brass-deep);display:inline-flex;align-items:center;gap:.6rem;margin-bottom:var(--space-2)}
.kicker::before{content:"";width:2.2rem;height:1px;background:var(--brass)}
.hero h1{font-size:var(--step-5);margin-bottom:var(--space-2)}
.hero p.lede{font-size:var(--step-1);color:var(--ink-soft);max-width:46ch}
.hero-actions{display:flex;gap:.9rem;margin-top:var(--space-3);flex-wrap:wrap}
.orbital{position:relative;aspect-ratio:1;max-width:520px;margin-inline:auto;width:100%}
.orbital .ring{position:absolute;inset:0;border:1px solid var(--line-strong);border-radius:50%}
.orbital .ring:nth-child(2){inset:12%}
.orbital .ring:nth-child(3){inset:26%}
.orbital .ring:nth-child(4){inset:40%}
.orbital .sun{position:absolute;top:50%;left:50%;width:14%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 35% 35%,var(--brass),var(--brass-deep));transform:translate(-50%,-50%);box-shadow:0 0 40px color-mix(in oklab,var(--brass) 40%,transparent)}
.orbital .planet{position:absolute;top:50%;left:50%;border-radius:50%;background:var(--oxblood)}
.orbital .planet.p1{width:5%;aspect-ratio:1;offset-path:border-box;animation:orbit 18s linear infinite;transform-origin:0 0}
.orbital .planet.p2{width:4%;aspect-ratio:1;background:var(--brass-deep);animation:orbit 30s linear infinite reverse}
.orbital .planet.p3{width:3.5%;aspect-ratio:1;background:var(--ink-soft);animation:orbit 44s linear infinite}
@keyframes orbit{from{transform:rotate(0deg) translateX(45%)}to{transform:rotate(360deg) translateX(45%)}}
.hero-tick{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;color:var(--ink-soft);margin-top:var(--space-2)}

/* ---------- sections ---------- */
.section{padding:var(--space-5) 0}
.section.alt{background:var(--paper-deep)}
.section-head{max-width:60ch;margin-bottom:var(--space-3)}
.section-head p{color:var(--ink-soft)}
.rule{height:1px;background:linear-gradient(90deg,var(--brass) 0%,transparent 70%);border:0;margin:var(--space-2) 0}

/* cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-3)}
.card{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .35s var(--ease-out),box-shadow .35s var(--ease-out),border-color .35s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--brass)}
.card-media{aspect-ratio:4/3;background:linear-gradient(160deg,var(--paper-deep),var(--glass));display:grid;place-items:center;border-bottom:1px solid var(--line)}
.card-media svg{width:56%;height:56%;color:var(--brass-deep)}
.card-body{padding:1.2rem 1.3rem 1.4rem;display:grid;gap:.5rem}
.card h3{font-size:var(--step-1);margin:0}
.card .spec{font-family:var(--font-mono);font-size:.72rem;color:var(--ink-soft);letter-spacing:.06em}
.card .price{font-family:var(--font-mono);font-size:.9rem;color:var(--oxblood)}
.card .more{margin-top:auto}

/* spec table */
.spec-table{width:100%;border-collapse:collapse;font-family:var(--font-mono);font-size:.8rem}
.spec-table th{text-align:left;font-weight:500;color:var(--ink-soft);letter-spacing:.08em;text-transform:uppercase;font-size:.68rem;padding:.7rem .9rem;border-bottom:1px solid var(--line-strong)}
.spec-table td{padding:.7rem .9rem;border-bottom:1px solid var(--line)}
.spec-table tr:hover td{background:color-mix(in oklab,var(--brass) 7%,transparent)}

/* timeline */
.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:11px;top:0;bottom:0;width:1px;background:var(--line-strong)}
.timeline li{position:relative;padding:0 0 var(--space-3) 3rem}
.timeline li::before{content:"";position:absolute;left:5px;top:.5em;width:13px;height:13px;border-radius:50%;background:var(--paper);border:2px solid var(--brass-deep)}
.timeline .year{font-family:var(--font-mono);color:var(--oxblood);font-size:.85rem;letter-spacing:.1em}

/* ---------- reveal animation ---------- */
.rv{opacity:0;transform:translateY(26px)}
.rv.in{opacity:1;transform:none;transition:opacity .7s var(--ease-out),transform .7s var(--ease-out);transition-delay:var(--rv-delay,0ms)}
.stagger > *{--rv-delay:0ms}
.stagger > *:nth-child(2){--rv-delay:80ms}
.stagger > *:nth-child(3){--rv-delay:160ms}
.stagger > *:nth-child(4){--rv-delay:240ms}
.stagger > *:nth-child(5){--rv-delay:320ms}
.stagger > *:nth-child(6){--rv-delay:400ms}

/* scroll-driven native (progressive) */
@supports (animation-timeline: view()){
  .rv{animation:reveal both;animation-timeline:view();animation-range:entry 5% entry 45%}
  .rv.in{animation:reveal both;animation-timeline:view()}
}
@keyframes reveal{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* scroll progress "escapement bar" */
.progress{position:fixed;top:0;left:0;height:3px;width:100%;z-index:150;transform-origin:0 50%;transform:scaleX(0);background:linear-gradient(90deg,var(--brass),var(--oxblood))}

/* ---------- page transition veil ---------- */
.veil{position:fixed;inset:0;background:var(--ink);z-index:400;pointer-events:none;opacity:0;transition:opacity .28s ease}
.veil.on{opacity:.92;pointer-events:all}

/* ---------- dial component ---------- */
.dial{width:min(340px,80vw);aspect-ratio:1;margin-inline:auto;position:relative}
.dial svg{width:100%;height:100%}
.dial .hand{transform-origin:50% 50%;transition:transform 1.2s var(--ease-out)}
.dial-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);text-align:center;margin-top:.6rem}

/* marquee */
.marquee{overflow:hidden;border-block:1px solid var(--line);padding:.8rem 0;background:var(--paper-deep)}
.marquee-track{display:flex;gap:3rem;width:max-content;animation:marquee 36s linear infinite}
.marquee span{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-soft);white-space:nowrap}
@keyframes marquee{to{transform:translateX(-50%)}}

/* breadcrumbs + pager */
.crumbs{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;color:var(--ink-soft);margin:var(--space-2) 0}
.crumbs a{color:var(--ink-soft)}
.page-head{padding:var(--space-4) 0 var(--space-3);border-bottom:1px solid var(--line)}
.page-head h1{font-size:var(--step-4)}
.page-head .lede{color:var(--ink-soft);font-size:var(--step-1);max-width:52ch}

/* prose */
.prose{max-width:70ch}
.prose p{margin:0 0 1.2em}
.prose blockquote{margin:1.5em 0;padding:.2em 0 .2em 1.4em;border-left:3px solid var(--brass);font-family:var(--font-display);font-size:var(--step-1)}
.prose dl{display:grid;grid-template-columns:auto 1fr;gap:.4rem 1.4rem;font-size:var(--step--1)}
.prose dt{font-family:var(--font-mono);color:var(--brass-deep)}
.post-meta{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft)}

/* empty + error states */
.empty-state{border:1px dashed var(--line-strong);border-radius:var(--radius);padding:var(--space-4);text-align:center;color:var(--ink-soft);background:var(--glass)}
.empty-state strong{display:block;font-family:var(--font-display);font-size:var(--step-2);color:var(--ink);margin-bottom:.4rem}
.error-callout{border:1px solid var(--oxblood);background:color-mix(in oklab,var(--oxblood) 7%,transparent);padding:1rem 1.2rem;border-radius:var(--radius)}
.skeleton{background:linear-gradient(90deg,var(--line) 25%,var(--paper-deep) 50%,var(--line) 75%);background-size:200% 100%;animation:shimmer 1.4s infinite;border-radius:var(--radius)}
@keyframes shimmer{to{background-position:-200% 0}}

/* 404 */
.notfound{min-height:70vh;display:grid;place-content:center;text-align:center;gap:var(--space-2)}
.notfound .code{font-family:var(--font-mono);font-size:var(--step-5);color:var(--brass);letter-spacing:.1em}

/* grid utilities */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4)}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3)}
.pill{display:inline-block;font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;border:1px solid var(--line-strong);border-radius:999px;padding:.25rem .7rem;color:var(--ink-soft)}
.pill-accent{border-color:var(--brass);color:var(--brass-deep)}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .rv{opacity:1 !important;transform:none !important}
  .rv.in{transition:none}
  .marquee-track{animation:none;flex-wrap:wrap;width:auto}
  .orbital .planet{animation:none}
  .orbital .planet.p1{transform:rotate(40deg) translateX(45%)}
  .orbital .planet.p2{transform:rotate(200deg) translateX(36%)}
  .orbital .planet.p3{transform:rotate(300deg) translateX(28%)}
}

@media (max-width:900px){
  .hero-grid,.two-col{grid-template-columns:1fr}
  .three-col{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .main-nav{position:absolute;top:100%;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);display:none;padding:var(--space-2)}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:.6rem}
  .nav-toggle{display:inline-block}
  .three-col{grid-template-columns:1fr}
  .prose dl{grid-template-columns:1fr}
  .hero h1{font-size:var(--step-4)}
}