/* =====================================================================
   NEXUS HESTIA — UNIFIED SITE · BASE
   Mode-independent tokens, reset, type, layout, header, buttons, hero.
   No colour literals in this file: every colour is a token from theme-dark.css / theme-light.css.
   Composition follows nexushestia.com (tall hero, fixed glass nav, 12px radii, pink glow, gradient CTA).
   Palette and typefaces follow the design-system workbook.
   ===================================================================== */
:root{
  --ff-display:"Bebas Neue","Arial Narrow",Impact,sans-serif;
  --ff-mono:"Space Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --ff-body:"DM Sans",-apple-system,"Segoe UI",Roboto,sans-serif;
  --ff-data:"Space Mono","Courier New",monospace;

  --fs-hero:clamp(2.6rem,8vw,6rem);       /* nexushestia.com hero: clamp(2rem,8vw,6rem), both headline lines at one size (exception to the workbook's 48-72px; see manifest/layout-sources.json) */
  --lh-hero:1.04;
  --fs-h2:clamp(36px,4.8vw,64px);
  --fs-h3:clamp(22px,2.4vw,30px);
  --fs-label:11px;
  --ls-label:.18em;
  --fs-body:17px;

  --r-sm:8px; --r-md:12px; --r-lg:16px;
  --max-w:1240px;
  --header-h:76px;
  --gutter:clamp(20px,4vw,40px);

  --ease:cubic-bezier(.22,.85,.32,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --dur-fast:140ms; --dur:280ms; --dur-slow:520ms;
}

*,*::before,*::after{box-sizing:border-box}
html{background:var(--c-bg);scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--c-bg);color:var(--c-text-body);font-family:var(--ff-body);font-size:var(--fs-body);font-weight:400;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease)}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-focus);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--max-w);margin:0 auto;padding-inline:var(--gutter)}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:8px;background:var(--c-text-heading);color:var(--c-bg);padding:8px 14px;border-radius:8px;z-index:400;font-family:var(--ff-mono);font-size:12px}
.skip:focus{left:8px}
.topline{position:fixed;top:0;left:0;right:0;height:2px;background:var(--gradient-top);z-index:310;pointer-events:none}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--ff-display);font-weight:400;color:var(--c-text-heading);letter-spacing:.02em;text-transform:uppercase}
h2{font-size:var(--fs-h2);line-height:1;margin:0 0 16px;max-width:22ch}
h3{font-size:var(--fs-h3);line-height:1.05;margin:0 0 8px}
p{margin:0 0 14px}
.eyebrow{display:flex;align-items:center;gap:12px;font-family:var(--ff-mono);font-size:var(--fs-label);letter-spacing:var(--ls-label);text-transform:uppercase;color:var(--c-text-muted);margin:0 0 22px}
.eyebrow b{color:var(--c-hearth-text);font-weight:700}
.eyebrow::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--c-border),transparent)}
.eyebrow--plain::after{display:none}
.section-kicker{font-family:var(--ff-mono);font-size:var(--fs-label);letter-spacing:var(--ls-label);text-transform:uppercase;color:var(--c-text-muted);margin:0 0 12px}
.lede{font-size:clamp(17px,1.9vw,21px);line-height:1.5;color:var(--c-text-heading);max-width:66ch;margin:0 0 16px}
.lede strong{font-weight:700}
.lede--body{color:var(--c-text-body)}
.mono-tag{font-family:var(--ff-mono);font-size:.82em;color:var(--c-magenta-text);background:var(--c-magenta-soft);padding:.12em .5em;border-radius:6px;white-space:nowrap}
.small{font-size:13.5px;color:var(--c-text-muted)}
.mono{font-family:var(--ff-mono)}
.section-head{margin-bottom:38px;max-width:80ch}
.grad-text{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.disclaim{font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--c-text-muted);margin:16px 0 0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--ff-mono);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;text-decoration:none;
  padding:16px 28px;border-radius:var(--r-md);border:2px solid var(--c-border);background:transparent;color:var(--c-text-heading);cursor:pointer;
  transition:transform var(--dur-fast) var(--ease-spring),border-color var(--dur-fast) ease,box-shadow var(--dur) ease,filter var(--dur-fast) ease}
.btn:hover{transform:translateY(-2px);border-color:var(--c-text-muted)}
.btn:active{transform:translateY(0)}
.btn-cta{background:var(--grad-cta);color:var(--c-on-accent);border-color:transparent}
.btn-cta:hover{filter:brightness(1.06);border-color:transparent}
.btn-ghost{border-color:var(--c-border-bright);color:var(--c-text-heading)}
.btn-ghost:hover{border-color:var(--c-hearth-text);color:var(--c-hearth-text)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- brand lockup (header specification: emblem + NEXUS / HESTIA + TECHNOLOGIES INC) ---------- */
.lockup{flex:none;display:inline-flex;align-items:center;gap:12px;text-decoration:none;line-height:1}
.lockup__mark{width:46px;height:46px;flex:none;object-fit:contain}
.lockup__live{display:inline-flex;align-items:center;gap:12px}
.lockup__img{display:none;height:38px;width:auto;max-width:none;flex:none}
.lockup__text{display:flex;flex-direction:column;gap:5px}
.lockup__name{font-family:var(--ff-display);font-size:26px;letter-spacing:.05em;line-height:1;white-space:nowrap}
.lockup__nexus{color:var(--logo-text)}
.lockup__hestia{color:var(--c-magenta);margin-left:.28em}
.lockup__sub{font-family:var(--ff-mono);font-size:7.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--logo-sub)}
.lockup--stacked{flex-direction:column;align-items:center;gap:10px;text-align:center}
.lockup--stacked .lockup__mark{width:88px;height:88px}
.lockup--stacked .lockup__text{align-items:center}
.lockup--stacked .lockup__name{font-size:30px}
.lockup--stacked .lockup__sub{font-size:8.5px}

/* ---------- header, clock, theme toggle ---------- */
.site-header{position:fixed;inset:2px 0 auto 0;height:var(--header-h);z-index:300;background:var(--glass-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--c-border)}
.site-header .wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:18px}
.nav{display:none;gap:18px;font-family:var(--ff-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase}
.nav a{white-space:nowrap;text-decoration:none;color:var(--c-text-muted);padding:6px 0;border-bottom:1px solid transparent;transition:color var(--dur-fast) ease,border-color var(--dur-fast) ease}
.nav a:hover,.nav a[aria-current="true"]{color:var(--c-text-heading);border-bottom-color:var(--c-magenta)}
@media(min-width:1240px){.nav{display:flex}}
.hdr-right{display:flex;align-items:center;gap:10px}
.clock{font-family:var(--ff-mono);font-size:12px;color:var(--c-text-muted);display:none;align-items:center;gap:8px;border:1px solid var(--c-border);border-radius:999px;padding:7px 12px;background:var(--c-panel);white-space:nowrap}
@media(min-width:520px){.clock{display:flex}}
@media(min-width:1240px) and (max-width:1499px){.clock{display:none}}   /* room for the wider lockup */
.clock b{color:var(--c-text-heading);font-weight:700;min-width:5ch;display:inline-block}
.clock .pulse{width:6px;height:6px;border-radius:50%;background:var(--c-hearth);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
.theme-toggle{display:inline-flex;align-items:center;gap:8px;min-height:36px;padding:7px 14px;border-radius:999px;border:1px solid var(--c-border);background:var(--c-panel);color:var(--c-text-heading);
  font-family:var(--ff-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;cursor:pointer;transition:border-color var(--dur-fast) ease,transform var(--dur-fast) var(--ease-spring)}
.theme-toggle:hover{border-color:var(--c-magenta);transform:scale(1.04)}
.theme-toggle__icon{width:14px;height:14px;border-radius:50%;border:2px solid currentColor;position:relative;flex:none;
  background:linear-gradient(90deg,currentColor 50%,transparent 50%)}
.hdr-cta{display:none;padding:10px 18px;font-size:11px;white-space:nowrap}
@media(min-width:760px){.hdr-cta{display:inline-flex}}
.progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--grad-cta)}

/* ---------- sections + act markers ---------- */
main{display:block}
.sec{padding:clamp(48px,6.5vw,88px) 0;position:relative}
.sec--void{background:var(--c-void);border-block:1px solid var(--c-border-soft)}
.act{padding:clamp(56px,8vw,96px) 0 0}
.act .wrap{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;border-top:1px solid var(--c-border);padding-top:18px}
.act-num{font-family:var(--ff-mono);font-size:12px;letter-spacing:.2em;color:var(--c-magenta-text)}
.act-title{font-family:var(--ff-display);font-size:clamp(28px,4vw,44px);color:var(--c-text-heading);letter-spacing:.05em;line-height:1;text-transform:uppercase}
.act-note{font-family:var(--ff-mono);font-size:11.5px;color:var(--c-text-muted);margin-left:auto}
.act + .sec{padding-top:clamp(32px,5vw,56px)}
.act-row{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;border-top:1px solid var(--c-border);padding-top:18px}
.act--prologue{padding-top:clamp(40px,6vw,72px)}
.act--prologue .act-title{margin:0;font-weight:400;max-width:24ch}

.rv{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
.no-js .rv{opacity:1;transform:none}

/* ---------- hero (composition from nexushestia.com) ---------- */
.hero{position:relative;overflow:hidden;isolation:isolate;
  padding:calc(var(--header-h) + clamp(56px,11vh,150px)) 0 clamp(64px,9vw,120px)}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;pointer-events:none}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-1;opacity:var(--hearth-alpha);pointer-events:none}
.hero__glow{position:absolute;width:520px;height:520px;margin:-260px 0 0 -260px;border-radius:50%;pointer-events:none;z-index:-1;
  background:radial-gradient(circle,var(--glow-accent) 0%,transparent 70%);opacity:0;transition:opacity var(--dur) ease;will-change:transform}
.hero.is-hover .hero__glow{opacity:1}
.hero__top{min-height:calc(100svh - var(--header-h) - clamp(56px,11vh,150px) - 24px);display:flex;flex-direction:column;justify-content:center;padding-bottom:clamp(32px,6vh,72px)}
.hero h1{font-size:var(--fs-hero);line-height:var(--lh-hero);letter-spacing:.012em;margin:0 0 28px;max-width:100%;overflow-wrap:break-word}
.hero h1 .line{display:block}
.typewriter-cursor{display:inline-block;width:.06em;min-width:4px;height:.8em;background:var(--c-magenta);margin-left:.06em;vertical-align:baseline;animation:blink .8s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.hero .lede{font-size:clamp(18px,2vw,23px);max-width:58ch}
.hero-tag{margin:0 0 6px;color:var(--c-text-body)}
.hero-pat{display:inline-flex;align-items:center;gap:8px;font-family:var(--ff-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-hearth-text);border:1px solid var(--c-hearth-line);border-radius:999px;padding:5px 12px;margin-left:auto}
.scroll-cue{margin-top:40px;font-family:var(--ff-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--c-text-muted);display:flex;align-items:center;gap:12px}
.scroll-cue::before{content:"";width:1px;height:36px;background:linear-gradient(var(--c-magenta),transparent)}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .rv{opacity:1;transform:none}
  .typewriter-cursor,.clock .pulse{animation:none}
}