/* JTech History - jtech-history.com
   Brand: Gold #CBB577, Off-white #ECECF2, dark ground. Source Serif 4 display, Inter body and labels.
   Convention: no em-dashes anywhere in this project. */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#111316;
  --bg-2:#16191D;
  --panel:#1B1F24;
  --line:rgba(236,236,242,.10);
  --line-strong:rgba(236,236,242,.20);
  --text:#ECECF2;
  --dim:#A9AFB9;
  --faint:#767D87;
  --gold:#CBB577;
  --gold-dim:rgba(203,181,119,.55);
  --gold-faint:rgba(203,181,119,.16);
  /* Heading typeface. Source Serif 4 keeps a serif register without the
     angular, high-contrast look of Spectral. For fully sans headings,
     replace the line below with: --serif:'Inter',system-ui,sans-serif; */
  --serif:'Source Serif 4',Georgia,serif;
  --sans:'Inter',system-ui,sans-serif;
  --mono:'Inter',system-ui,sans-serif; /* option B: labels in Inter, not monospace */
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}

/* Nothing may exceed its container. Guards against sideways scroll on phones. */
img,iframe,video,model-viewer,svg{max-width:100%}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  font-family:var(--sans);font-weight:300;
  background:var(--bg);color:var(--text);
  line-height:1.65;-webkit-font-smoothing:antialiased;
}

.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 28px}

::selection{background:var(--gold);color:#111316}

a{color:var(--text)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--gold);outline-offset:2px;
}

p{color:var(--dim);font-size:1rem;max-width:68ch}
strong{color:var(--text);font-weight:400}

.eyebrow{
  font-family:var(--mono);font-size:.72rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--gold);
}
h2{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(1.65rem,3.4vw,2.35rem);
  line-height:1.18;letter-spacing:-.01em;
  margin:14px 0 18px;color:var(--text);
}
.lead{font-size:1.06rem;color:var(--dim);max-width:66ch}

/* Replay scrubber: scroll progress as the signature motif */
.replay-bar{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:linear-gradient(90deg,var(--gold-dim),var(--gold));
  z-index:120;
}

/* Nav */
nav{
  position:sticky;top:0;z-index:100;
  background:rgba(17,19,22,.88);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:60px}
.brand{
  font-family:var(--serif);font-weight:500;font-size:1.08rem;
  letter-spacing:.02em;text-decoration:none;white-space:nowrap;
}
.brand span{color:var(--gold)}
.nav-links{display:flex;gap:24px;margin-left:auto;align-items:center}
.nav-links a{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--dim);text-decoration:none;
  transition:color .2s;
}
.nav-links a:hover{color:var(--gold)}
.lang-toggle{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;
  color:var(--text) !important;border:1px solid var(--line-strong);
  padding:5px 11px;border-radius:3px;
}
.lang-toggle:hover{border-color:var(--gold)}
@media(max-width:760px){
  .nav-links a:not(.lang-toggle):not(.nav-contact){display:none}
}

/* Hero */
.hero{padding:84px 0 76px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:48px;align-items:center}
@media(min-width:920px){.hero-grid{grid-template-columns:1.05fr .95fr}}
.hero .kicker{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);margin-bottom:24px;
  display:flex;align-items:center;gap:14px;
}
.hero .kicker::after{content:'';height:1px;flex:1;max-width:110px;background:var(--gold-dim);opacity:.6}
.hero h1{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(2rem,4.6vw,2.95rem);
  line-height:1.14;letter-spacing:-.015em;max-width:18ch;
}
.hero .sub{margin-top:22px;font-size:1.1rem;max-width:52ch}
.cta-row{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{
  display:inline-block;text-decoration:none;
  font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;
  padding:13px 22px;border-radius:3px;transition:opacity .2s,border-color .2s;
}
.btn-gold{background:var(--gold);color:#111316;font-weight:500}
.btn-gold:hover{opacity:.85}
.btn-line{border:1px solid var(--line-strong);color:var(--text)}
.btn-line:hover{border-color:var(--gold)}

/* Video cards */
.vid-card{
  border:1px solid var(--line);background:var(--bg-2);
  border-radius:5px;overflow:hidden;
}
.vid-embed{position:relative;width:100%;padding-top:56.25%;background:#0B0C0E}
.vid-embed iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}
.vid-meta{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:14px;padding:14px 18px;flex-wrap:wrap;
}
.vid-title{font-size:.94rem;color:var(--text);font-weight:400}
.vcount{
  font-family:var(--mono);font-size:.72rem;color:var(--gold);
  letter-spacing:.06em;white-space:nowrap;
  display:inline-flex;align-items:center;gap:7px;
}
.vcount::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--gold)}
.vid-note{padding:0 18px 16px;font-size:.88rem;color:var(--faint);max-width:none}

/* Sections */
section{padding:84px 0;border-top:1px solid var(--line)}
@media(max-width:700px){section{padding:60px 0}.hero{padding:56px 0}}

/* Format cards */
.formats{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:38px}
@media(min-width:760px){.formats{grid-template-columns:1fr 1fr}}
.format{background:var(--bg-2);padding:28px 30px}
.format .f-label{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--gold);
}
.format h3{
  font-family:var(--serif);font-weight:500;font-size:1.22rem;
  margin:12px 0 8px;letter-spacing:-.005em;
}
.format p{font-size:.94rem;max-width:none}

/* Timetravel */
.tt-grid{display:grid;grid-template-columns:1fr;gap:44px;margin-top:38px;align-items:center}
@media(min-width:860px){.tt-grid{grid-template-columns:.72fr 1fr}}
.tt-figure{margin:0;max-width:340px}
.tt-figure img{
  width:100%;height:auto;display:block;border-radius:5px;
  border:1px solid var(--line-strong);
}
.tt-figure figcaption{
  font-family:var(--mono);font-size:.7rem;color:var(--faint);
  letter-spacing:.05em;margin-top:12px;line-height:1.8;
}
.tt-body p{margin-bottom:16px}
.tt-body p:last-child{margin-bottom:0}

/* Method */
.rigor{
  margin-top:34px;padding:26px 30px;
  border-left:2px solid var(--gold);background:var(--bg-2);
}
.rigor p{color:var(--text);font-size:.98rem;max-width:74ch}
.rigor-points{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:26px}
@media(min-width:760px){.rigor-points{grid-template-columns:1fr 1fr 1fr}}
.rigor-points div{background:var(--bg-2);padding:20px 24px}
.rigor-points .rp-label{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gold);display:block;margin-bottom:8px;
}
.rigor-points p{font-size:.9rem;max-width:none}

/* Channel stats: dock-style readout */
.stats-row{
  display:grid;grid-template-columns:1fr;gap:1px;
  background:var(--line);border:1px solid var(--line);
  margin-top:38px;
}
@media(min-width:700px){.stats-row{grid-template-columns:1.4fr 1fr 1fr}}
.stat{background:var(--bg-2);padding:26px 30px}
.stat .s-label{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--faint);display:block;margin-bottom:10px;
}
.stat .s-value{
  font-family:var(--serif);font-weight:500;font-size:2.1rem;
  line-height:1;color:var(--text);letter-spacing:-.01em;
}
.stat.stat-primary .s-value{color:var(--gold);font-size:2.6rem}
.stats-note{
  font-family:var(--mono);font-size:.68rem;color:var(--faint);
  letter-spacing:.06em;margin-top:14px;
  display:flex;align-items:center;gap:8px;
}
.stats-note::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--gold)}

.featured-grid{display:grid;grid-template-columns:1fr;gap:26px;margin-top:38px}
@media(min-width:760px){.featured-grid{grid-template-columns:1fr 1fr}}
.channel-cta{margin-top:36px}

/* Audience */
.aud-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:38px}
@media(min-width:760px){.aud-grid{grid-template-columns:1fr 1fr}}
.aud{background:var(--bg-2);padding:24px 28px}
.aud h3{font-family:var(--serif);font-weight:500;font-size:1.1rem;margin-bottom:6px}
.aud p{font-size:.92rem;max-width:none}
.about-note{margin-top:34px;font-size:.98rem;max-width:70ch}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr;gap:52px;margin-top:38px}
@media(min-width:860px){.contact-grid{grid-template-columns:1.15fr .85fr}}
.field{margin-bottom:18px}
.field label{
  display:block;font-family:var(--mono);font-size:.68rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
  margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;background:var(--bg-2);border:1px solid var(--line-strong);
  border-radius:3px;color:var(--text);font-family:var(--sans);
  font-size:.98rem;font-weight:300;padding:12px 14px;
  transition:border-color .2s;
}
.field input:focus,.field textarea:focus{border-color:var(--gold);outline:none}
.field textarea{min-height:150px;resize:vertical}
.form-status{
  font-family:var(--mono);font-size:.76rem;letter-spacing:.05em;
  margin-top:16px;color:var(--gold);min-height:1.4em;
}
button.btn-gold{border:0;cursor:pointer;font-family:var(--mono)}
button.btn-gold:disabled{opacity:.5;cursor:default}

.coord{border-left:2px solid var(--gold);padding-left:26px}
.coord .c-name{font-family:var(--serif);font-weight:500;font-size:1.2rem}
.coord .c-role{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold);margin:6px 0 20px;
}
.coord a{color:var(--dim);text-decoration:none;transition:color .2s}
.coord a:hover{color:var(--gold)}
.coord .c-line{display:block;font-size:.95rem;margin-bottom:8px;color:var(--dim)}
.socials{display:flex;gap:18px;margin-top:26px}
.socials a{display:inline-flex;align-items:center;gap:8px;font-size:.88rem}
.socials svg{width:17px;height:17px;fill:currentColor}

/* Footer */
footer{border-top:1px solid var(--line);padding:40px 0 56px}
.foot-inner{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:baseline}
.foot-meta{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--faint);line-height:2.1;
}
.foot-meta b{color:var(--dim);font-weight:500}
footer a{color:var(--faint);text-decoration:none}
footer a:hover{color:var(--gold)}

/* Format rows: each format shown with its own live example */
.fmt-row{
  display:grid;grid-template-columns:1fr;gap:30px;align-items:center;
  padding:46px 0;border-top:1px solid var(--line);
}
.fmt-row:first-of-type{border-top:0;padding-top:34px}
@media(min-width:900px){
  .fmt-row{grid-template-columns:.66fr 1.34fr;gap:52px}
  .fmt-row.reverse{grid-template-columns:1.34fr .66fr}
  .fmt-row.reverse .fmt-media{order:-1}
}
.fmt-text h3{
  font-family:var(--serif);font-weight:500;font-size:1.45rem;
  margin:12px 0 10px;letter-spacing:-.005em;
}
.fmt-text p{font-size:.97rem;max-width:none}
.fmt-eg{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--faint);margin-top:20px;
  display:flex;gap:12px;align-items:center;flex-wrap:wrap;
}
.fmt-eg .vcount{font-size:.7rem}

/* Interactive 3D viewer */
.mv-wrap{border:1px solid var(--line);background:var(--bg-2);border-radius:5px;overflow:hidden}
.mv-stage{position:relative;background:#0B0C0E}
model-viewer{
  width:100%;height:420px;display:block;background:#0B0C0E;
  --poster-color:transparent;
}
@media(max-width:600px){model-viewer{height:340px}}

.hotspot{
  display:flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:50%;
  background:var(--gold);border:2px solid rgba(17,19,22,.75);
  cursor:pointer;position:relative;z-index:2;
  box-shadow:0 2px 10px rgba(0,0,0,.55);
  transition:transform .3s cubic-bezier(.16,1,.3,1),box-shadow .3s;
}
.hotspot::before{
  content:'';position:absolute;width:28px;height:28px;border-radius:50%;
  border:1.5px solid var(--gold);animation:hs-pulse 2s ease-in-out infinite;
}
.hotspot:hover{transform:scale(1.15);box-shadow:0 4px 16px rgba(0,0,0,.6),0 0 0 8px var(--gold-faint)}
.hotspot.active{background:var(--bg);border-color:var(--gold);transform:scale(1.2)}
.hs-num{
  font-family:var(--mono);font-size:.64rem;font-weight:500;
  color:#111316;line-height:1;pointer-events:none;
}
.hotspot.active .hs-num{color:var(--gold)}
@keyframes hs-pulse{0%,100%{transform:scale(1);opacity:.55}50%{transform:scale(1.8);opacity:0}}
@media(prefers-reduced-motion:reduce){.hotspot::before{animation:none;opacity:0}}

.hotspot-nav{
  position:absolute;bottom:14px;left:50%;transform:translateX(-50%);
  display:flex;gap:6px;z-index:10;
  background:rgba(17,19,22,.8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);border-radius:4px;padding:5px 8px;
}
.hotspot-nav button{
  width:32px;height:32px;border-radius:3px;border:1px solid var(--line-strong);
  background:transparent;color:var(--dim);font-family:var(--mono);
  font-size:.72rem;font-weight:500;cursor:pointer;transition:all .25s;
  display:flex;align-items:center;justify-content:center;
}
.hotspot-nav button:hover{border-color:var(--gold);color:var(--gold)}
.hotspot-nav button.active{background:var(--gold);border-color:var(--gold);color:#111316}

.ar-button{
  position:absolute;bottom:14px;right:14px;
  background:var(--gold);color:#111316;border:0;border-radius:3px;
  padding:10px 16px;font-family:var(--mono);font-weight:500;font-size:.7rem;
  letter-spacing:.08em;cursor:pointer;white-space:nowrap;
  box-shadow:0 4px 14px rgba(0,0,0,.5);
}
.ar-button:hover{opacity:.88}
@media(max-width:700px) and (orientation:portrait){
  .hotspot-nav{bottom:70px}
  .ar-button{left:50%;right:auto;bottom:16px;transform:translateX(-50%)}
}

.info-panel{padding:22px 24px;border-top:1px solid var(--line);min-height:118px}
.info-panel p{font-size:.92rem;max-width:none}
.info-default strong{color:var(--gold);font-weight:400}
.info-detail{display:flex;gap:22px;align-items:flex-start;animation:hs-fade .35s ease}
.info-text{flex:1}
.info-text .il-label{
  font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gold);display:block;margin-bottom:6px;
}
.info-text h4{font-family:var(--serif);font-weight:500;font-size:1.22rem;margin-bottom:8px}
.info-close{
  flex-shrink:0;background:none;border:1px solid var(--line-strong);
  color:var(--dim);width:30px;height:30px;border-radius:3px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:1.05rem;transition:all .2s;
}
.info-close:hover{border-color:var(--gold);color:var(--gold)}
@keyframes hs-fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:600px){.info-detail{flex-direction:column;gap:12px}}

.mv-credit{
  padding:0 24px 18px;font-family:var(--mono);font-size:.66rem;
  letter-spacing:.05em;color:var(--faint);line-height:1.9;
}
.mv-fallback{
  padding:34px 26px;text-align:center;font-family:var(--mono);
  font-size:.74rem;letter-spacing:.06em;color:var(--faint);line-height:2;
}

/* Vertical Short embed */
.short-row{display:grid;grid-template-columns:1fr;gap:34px;margin-top:38px;align-items:center}
@media(min-width:820px){.short-row{grid-template-columns:.5fr 1fr}}
.short-embed{
  position:relative;width:100%;max-width:290px;padding-top:calc(min(100%,290px) * 1.777);
  border:1px solid var(--line);border-radius:5px;overflow:hidden;background:#0B0C0E;
}
.short-embed iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}

/* Flagship tool block */
.flagship{margin-top:36px}
.flagship .vid-title{font-size:1rem}

.modes{
  display:grid;grid-template-columns:1fr;gap:1px;
  background:var(--line);border:1px solid var(--line);margin-top:34px;
}
@media(min-width:640px){.modes{grid-template-columns:1fr 1fr}}
@media(min-width:940px){.modes{grid-template-columns:1fr 1fr 1fr}}
.mode{background:var(--bg-2);padding:22px 24px}
.mode .m-label{
  font-family:var(--mono);font-size:.65rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gold);display:block;margin-bottom:9px;
}
.mode p{font-size:.9rem;max-width:none;color:var(--dim)}

.subhead{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(1.3rem,2.4vw,1.6rem);line-height:1.2;
  margin:0 0 16px;color:var(--text);
}

/* Full-width interactive site block */
.site-block{padding:46px 0;border-top:1px solid var(--line)}
.site-block .f-label{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--gold);display:block;
}
.site-block h3{margin:12px 0 12px}
.site-block .mv-wrap{margin-top:28px}
.site-block model-viewer{height:560px}
@media(max-width:700px){.site-block model-viewer{height:400px}}

/* Channel Short: centered */
.short-row{display:block;max-width:600px;margin:40px auto 0;text-align:center}
.short-embed{margin:0 auto 22px}
.short-row .fmt-eg{justify-content:center;margin-top:0;margin-bottom:10px}
.short-row p{margin-left:auto;margin-right:auto}
.channel-cta{text-align:center}

/* ---------------------------------------------------------------
   Typography option B.
   The label typeface moved to Inter via --mono above. This block
   retunes those labels: slightly larger, heavier, and far less
   tracked. The old 0.24em tracking at 11px was most of the strain.
   Headings are unaffected. To revert, set --mono back to
   'JetBrains Mono', monospace and delete this block.
   --------------------------------------------------------------- */
/* Section headers, option D: a larger label sitting on a full width rule.
   Applied to the hero kicker as well, so every section marker matches and
   the hero's old trailing hairline is retired. */
.eyebrow,.hero .kicker{
  display:block;
  font-size:.9rem;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--gold);
  padding-bottom:14px;margin-bottom:24px;
  border-bottom:1px solid var(--line-strong);
}
.hero .kicker::after{display:none}
h2{margin-top:0}
.nav-links a{font-size:.75rem;letter-spacing:.08em;font-weight:500}
.lang-toggle{font-size:.75rem;letter-spacing:.06em}
.btn{font-size:.78rem;letter-spacing:.06em;font-weight:600}
.vcount,.fmt-eg,.fmt-eg .vcount{font-size:.8rem;letter-spacing:.01em;font-weight:400}
.format .f-label,
.site-block .f-label,
.mode .m-label,
.rigor-points .rp-label,
.stat .s-label,
.info-text .il-label{font-size:.7rem;letter-spacing:.12em;font-weight:600}
.field label{font-size:.72rem;letter-spacing:.1em;font-weight:600}
.coord .c-role{font-size:.74rem;letter-spacing:.1em;font-weight:600}
.stats-note,.mv-hint{font-size:.74rem;letter-spacing:.02em}
.form-status{font-size:.82rem;letter-spacing:0}
.foot-meta{font-size:.72rem;letter-spacing:.06em}
.tt-figure figcaption,.mv-credit,.mv-fallback{font-size:.76rem;letter-spacing:.01em}
.ar-button{font-size:.76rem;letter-spacing:.05em;font-weight:600}
.hotspot-nav button{font-size:.78rem;font-weight:600}
.hs-num{font-size:.7rem;font-weight:600}