/* Jerry_AI brand tokens — see CoolJerry-chang/jerry_ai_brandkit BRAND.md */
:root{
  --night:#0B1220;--paper:#F2F5F3;--green:#2FE0A3;--panel:#18233A;--amber:#FFC24B;
  --mist:#C9D2DE;--mute:#8592A6;--green-deep:#0E9F6E;--line:#26324A;
  --zh:'Noto Sans TC','PingFang TC',sans-serif;
  --en:'Inter','Noto Sans TC',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --serif:'Instrument Serif',Georgia,serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;border-radius:0}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;background:var(--night);color:var(--mist);font-family:var(--zh);font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--zh);color:#fff;margin:0;letter-spacing:0;line-height:1.18}
.wrap{width:min(1240px,100% - 64px);margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:16px;top:-60px;z-index:100;background:var(--green);color:var(--night);padding:10px 16px;font-weight:700}
.skip:focus{top:16px}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}
.prompt{color:var(--green);font-family:var(--mono);font-weight:600}

/* square cursor — blinks 0.5s on / 0.5s off */
.cursor{display:inline-block;width:.5em;height:.72em;background:var(--green);margin-left:.12em;vertical-align:baseline;animation:blink 1s steps(1) infinite}
.cursor.sm{width:.55em;height:.9em;vertical-align:-.1em}
@keyframes blink{50%{opacity:0}}
.mini-squares{display:inline-flex;gap:5px}
.mini-squares i{width:8px;height:8px;background:var(--line)}
.mini-squares i:last-child{background:var(--green)}

.scroll-progress{position:fixed;inset:0 0 auto;height:3px;background:var(--green);transform-origin:left;transform:scaleX(0);z-index:60}

/* header */
.header{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff;font-family:var(--en);font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{width:44px;height:auto}
.brand-name span{font-family:var(--zh);font-weight:500;color:var(--mute);margin-left:6px}
.desktop-nav{display:flex;gap:26px;margin-left:auto;align-items:center}
.desktop-nav a{text-decoration:none;font-size:15px;color:var(--mist);transition:color .2s}
.desktop-nav a:hover{color:var(--green)}
.desktop-nav .nav-contact{background:var(--green);color:var(--night);padding:9px 16px;font-weight:700}
.desktop-nav .nav-contact:hover{background:#fff;color:var(--night)}
.nav-email{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);color:var(--mist)}
.nav-email:hover{border-color:var(--green);color:var(--green)}
.menu-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:#fff;font:600 14px var(--mono);padding:8px 14px;cursor:pointer}
.mobile-menu{position:absolute;top:72px;left:0;right:0;background:var(--night);border-bottom:1px solid var(--line);padding:16px 32px 28px;display:grid}
.mobile-menu[hidden]{display:none}
.mobile-menu a{padding:14px 0;border-bottom:1px solid var(--line);text-decoration:none;font-size:18px;color:#fff}

/* shared */
.eyebrow{font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--green);margin:0 0 20px;text-transform:uppercase}
.button{display:inline-flex;align-items:center;gap:10px;background:var(--green);color:var(--night);text-decoration:none;font-weight:700;padding:16px 26px;transition:transform .25s var(--ease),background .2s}
.button:hover{background:#fff;transform:translateY(-2px)}
.button.dark{background:var(--night);color:#fff}
.button.dark:hover{background:var(--panel)}
.text-link{display:inline-flex;gap:8px;color:#fff;font-weight:700;text-decoration:none;border-bottom:2px solid var(--green);padding-bottom:3px}
.text-link:hover{color:var(--green)}
.section{padding:120px 0}
.section-heading{max-width:760px;margin-bottom:56px}
.section-heading h2{font-size:clamp(34px,4.6vw,58px);font-weight:900}
.section-heading p:not(.eyebrow){color:var(--mist);margin:22px 0 0}

/* hero */
.hero{position:relative;padding:72px 0 40px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:72px 72px;background-position:-1px -1px}
.hero:after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.55),var(--night) 96%);pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(52px,7.4vw,104px);font-weight:900;line-height:1.08;margin-bottom:28px}
.hero h1 span{display:block}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 64%,var(--green) 64%,var(--green) 90%,transparent 90%);padding:0 .04em}
.hero-lede{font-size:clamp(17px,1.5vw,20px);color:var(--mist);margin:0 0 36px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:28px 32px}
.hero-foot{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:56px;padding-top:20px;border-top:1px solid var(--line);color:var(--mute);font-size:14px;align-items:baseline}
.serif{font-family:var(--serif);font-style:italic;font-size:22px;color:#fff}

.hero-stage{position:relative;aspect-ratio:4/5;background:var(--green);overflow:hidden;color:var(--night)}
.stage-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(11,18,32,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(11,18,32,.08) 1px,transparent 1px);background-size:5.5% 5.5%}
.giant{position:absolute;left:-2%;top:6%;font:900 clamp(200px,30vw,420px)/.8 var(--en);letter-spacing:-.06em;color:var(--night);opacity:.13;user-select:none}
.stage-label{position:absolute;top:22px;left:24px;right:24px;display:flex;justify-content:space-between;align-items:center;font:600 12px var(--mono);letter-spacing:.08em;z-index:3}
.stage-label .mini-squares i{background:var(--night)}
.stage-label .mini-squares i:last-child{background:#fff}
.portrait-panel{position:absolute;right:-4%;bottom:-2%;width:64%;margin:0;z-index:2}
.portrait-panel img{width:100%;height:auto}
.portrait-panel figcaption{position:absolute;right:calc(4% + 24px);top:56%;background:var(--paper);color:var(--night);padding:10px 14px;display:grid;line-height:1.35}
.portrait-panel figcaption span{font:800 15px var(--en)}
.portrait-panel figcaption small{font-size:12px;color:#33405a}
.term-card{position:absolute;z-index:4;background:var(--night);color:var(--mist);border:1px solid var(--line);box-shadow:12px 12px 0 rgba(11,18,32,.25)}
.term-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 14px;border-bottom:1px solid var(--line);font:500 12px var(--mono);color:var(--mute)}
.term-body{display:grid;gap:4px;padding:16px 20px 18px}
.term-body small{font-size:13px;color:var(--mute)}
.term-body strong{color:#fff;font-size:18px;font-weight:700}
.card-top{left:24px;bottom:30%;width:min(300px,62%)}
.card-bottom{left:24px;bottom:72px;width:min(300px,62%);background:var(--paper);border-color:var(--paper)}
.card-bottom small{color:#4b5873}
.card-bottom strong{color:var(--night)}
.stage-bottom{position:absolute;left:24px;bottom:22px;display:flex;gap:16px;font:600 11px var(--mono);letter-spacing:.1em;z-index:3}

/* signal track with walking cursor mascot */
.signal{position:relative;padding-top:12px}
.signal-track{position:relative;height:84px;border-bottom:1px dashed var(--line)}
.walker{position:absolute;bottom:-6px;left:0;width:96px;height:auto;animation:walk 16s ease-in-out infinite,bob .6s ease-in-out infinite alternate}
@keyframes walk{0%{left:0}50%{left:calc(100% - 96px)}100%{left:0}}
@keyframes bob{to{translate:0 -5px}}
.signal-bar{display:grid;grid-template-columns:repeat(3,1fr);font:500 14px var(--mono);color:var(--mute)}
.signal-bar span{padding:18px 0;border-right:1px solid var(--line);padding-left:20px}
.signal-bar span:first-child{padding-left:0}
.signal-bar span:last-child{border-right:0}
.signal-bar b{color:var(--green);font-family:var(--en);font-weight:800}

.kinetic-band{overflow:hidden;background:var(--green);color:var(--night);margin-top:80px;padding:18px 0;white-space:nowrap}
.kinetic-band div{display:inline-block;font:900 clamp(28px,4vw,52px)/1 var(--en);letter-spacing:-.03em;animation:marquee 32s linear infinite}
.kinetic-band b{font-size:.5em;vertical-align:.3em;margin:0 .6em}
@keyframes marquee{to{transform:translateX(-50%)}}

/* light sections (paper) */
.light{background:var(--paper);color:#2c3850}
.light h2,.light h3{color:var(--night)}
.light .eyebrow{color:var(--green-deep)}
.light .section-heading p:not(.eyebrow){color:#3a4660}
.light .text-link{color:var(--night);border-color:var(--green-deep)}
.light .text-link:hover{color:var(--green-deep)}
.light .prompt{color:var(--green-deep)}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
.about-copy p{margin:0 0 22px}
.about-copy strong{color:var(--night)}
.about-side{display:grid;gap:40px}
.chibi-wrap{position:relative;display:flex;align-items:flex-end;gap:24px}
.chibi{width:min(220px,42%);height:auto}
.bubble{align-self:flex-start;margin-top:20px;background:var(--night);color:#fff;font-weight:700;padding:16px 22px;position:relative;font-size:16px}
.bubble:after{content:'';position:absolute;left:-14px;bottom:18px;border:7px solid transparent;border-right-color:var(--night);border-bottom-color:var(--night)}
.bubble .prompt{color:var(--green)}
.experience{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--night)}
.experience div{padding:22px 20px 0 0}
.experience div+div{padding-left:20px;border-left:1px solid #cfd6d2}
.experience strong{display:block;white-space:nowrap;font:900 clamp(32px,3.2vw,46px)/1 var(--en);letter-spacing:-.04em;color:var(--night)}
.experience strong span{font:700 15px var(--zh);letter-spacing:0;color:var(--green-deep);margin-left:4px}
.experience p{margin:10px 0 0;font-size:14px;color:#4b5873}

/* topics */
.topics{background:var(--night)}
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}
.course{background:var(--panel);border:1px solid var(--line);transition:border-color .25s,transform .35s var(--ease)}
.course:hover{border-color:var(--green);transform:translateY(-4px)}
.course summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:1fr auto;position:relative}
.course summary::-webkit-details-marker{display:none}
.course summary .term-head{grid-column:1/-1}
.course-title{padding:28px 32px 0;display:grid;gap:14px}
.tag{justify-self:start;font:600 12px var(--mono);letter-spacing:.06em;color:var(--green);border:1px solid var(--green);padding:3px 10px}
.course h3{font-size:clamp(24px,2.4vw,30px);font-weight:900}
.expand{align-self:start;margin:28px 28px 0 0;width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);color:var(--green);font-size:0}
.expand:before{content:'＋';font:600 18px var(--mono)}
.course[open] .expand:before{content:'−'}
.course-body{padding:18px 32px 32px}
.course-body p{margin:0 0 16px}
.course-body ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.course-body li{padding-left:22px;position:relative;color:#fff}
.course-body li:before{content:'>';position:absolute;left:0;color:var(--green);font:600 15px var(--mono)}

/* work */
.work-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:48px;align-items:start}
.work-grid figure{margin:0}
.photo{position:relative;overflow:hidden}
.work-grid .photo{box-shadow:14px 14px 0 var(--green)}
.work-secondary{margin-top:96px!important}
.work-grid img{width:100%;height:auto;transition:transform .8s var(--ease)}
.work-grid figure:hover img{transform:scale(1.03)}
.work-grid figcaption{padding-top:34px}
.work-grid figcaption span{font:600 12px var(--mono);letter-spacing:.08em;color:var(--green)}
.work-grid h3{font-size:clamp(20px,2vw,26px);font-weight:900;margin:10px 0 8px}
.work-grid figcaption p{margin:0;color:var(--mute)}

/* voices */
.voices{background:var(--panel);border-block:1px solid var(--line)}
.voice-tabs{display:flex;flex-wrap:wrap;gap:0;margin-bottom:40px;border:1px solid var(--line);width:max-content;max-width:100%}
.voice-tabs button{background:none;border:0;border-right:1px solid var(--line);color:var(--mist);font:600 14px var(--mono);padding:12px 20px;cursor:pointer}
.voice-tabs button:last-child{border-right:0}
.voice-tabs button[aria-pressed=true]{background:var(--green);color:var(--night)}
.voice-grid{columns:3 300px;column-gap:24px}
.voice-stats{display:grid;grid-template-columns:repeat(3,1fr);margin:0 0 18px;border:1px solid var(--line)}
.voice-stats div{padding:26px 28px;border-right:1px solid var(--line);display:flex;flex-direction:column-reverse;gap:6px}
.voice-stats div:last-child{border-right:0}
.voice-stats dt{color:var(--mist);font-size:14px;font-weight:600}
.voice-stats dd{margin:0;color:var(--green);font:700 clamp(40px,5vw,64px)/1 var(--en)}
.voice-stats dd small{font-size:.32em;margin-left:6px;color:var(--mist);font-family:var(--mono)}
.voice-note{margin:0 0 40px;color:var(--mute);font:500 13px var(--mono)}
.voice-card.named{border-color:var(--green)}
.voice-card.named .avatar{font-family:var(--zh);font-size:15px}
.voice-card{break-inside:avoid;margin:0 0 24px;background:var(--night);border:1px solid var(--line);padding:26px 26px 22px;display:grid;gap:20px}
.voice-card[hidden]{display:none}
.voice-card blockquote{margin:0;color:#fff;font-size:16px;line-height:1.8}
.voice-card figcaption{display:flex;gap:12px;align-items:center;border-top:1px solid var(--line);padding-top:16px}
.avatar{width:34px;height:34px;flex:none;display:grid;place-items:center;background:var(--green);color:var(--night);font:700 16px var(--mono)}
[data-category=reader] .avatar{background:none;border:1px solid var(--green);color:var(--green);font-family:var(--serif);font-size:24px}
.voice-card strong{display:block;color:#fff;font-size:14px}
.voice-card small{color:var(--mute);font-size:12px}
.source-note{margin-top:24px;font-size:13px;color:var(--mute)}
.source-note a{color:var(--green)}

/* journal */
.journal-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:72px;align-items:center}
.journal-copy p:not(.eyebrow){margin:22px 0 30px}
.journal-copy h2{font-size:clamp(34px,4.6vw,58px);font-weight:900}
.journal-figure{position:relative;margin:0;padding-top:120px}
.journal-figure .photo{border:2px solid var(--night);box-shadow:14px 14px 0 var(--night)}
.journal-figure .cat{position:absolute;right:24px;top:0;width:160px;height:auto;z-index:2;transform-origin:bottom center;animation:peek 5s ease-in-out infinite}
@keyframes peek{0%,70%,100%{transform:rotate(0)}78%{transform:rotate(-4deg)}86%{transform:rotate(3deg)}}
.nowrap{white-space:nowrap}
#course h2{font-size:clamp(30px,3.9vw,54px)}
.course-actions{display:flex;flex-wrap:wrap;align-items:center;gap:24px}
.course-window{display:block;background:var(--night);border:2px solid var(--night);box-shadow:14px 14px 0 var(--green);text-decoration:none;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.course-window:hover{transform:translate(-3px,-3px);box-shadow:17px 17px 0 var(--green)}
.course-cover{position:relative;aspect-ratio:16/9;background:var(--panel);overflow:hidden}
.course-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cover-fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:8px;color:var(--green);font:600 18px var(--mono)}
.light .cover-fallback .prompt{color:var(--green)}
.course-points{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);border:2px solid var(--night)}
.course-points li{padding:16px 18px;font-weight:700;font-size:15px;line-height:1.5;border-right:2px solid var(--night);background:var(--paper)}
.course-points li:last-child{border-right:0}
.course-points b{display:block;font:600 12px var(--mono);color:var(--green-deep);margin-bottom:6px}
.journal-figure figcaption{margin-top:30px;font:600 13px var(--mono);color:#4b5873}

/* contact */
.contact{background:var(--green);color:var(--night)}
.contact-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:64px;align-items:center}
.contact .eyebrow{color:var(--night)}
.contact h2{font-size:clamp(38px,5.4vw,72px);font-weight:900;color:var(--night)}
.contact-copy p:not(.eyebrow){margin:22px 0 36px;font-size:18px;color:#13213a}
.contact-term{background:var(--night);border:1px solid var(--night);box-shadow:16px 16px 0 rgba(11,18,32,.25);color:var(--mist)}
.contact-term .wave{width:58%;margin:36px auto 12px;animation:bob 1.2s ease-in-out infinite alternate}
.contact-hint{display:block;padding:14px 20px 22px;font:500 14px var(--mono);color:#fff}

/* footer */
.footer{border-top:1px solid var(--line);padding:40px 0 96px}
.footer-inner{display:flex;flex-wrap:wrap;gap:16px 32px;align-items:center;justify-content:space-between;color:var(--mute);font-size:14px}

.motion-toggle{position:fixed;right:20px;bottom:20px;z-index:40;background:var(--night);color:var(--mist);border:1px solid var(--line);font:600 12px var(--mono);padding:10px 14px;cursor:pointer}
.motion-toggle:hover{border-color:var(--green);color:var(--green)}

/* reveal */
.js-motion .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease) var(--delay,0ms),transform .8s var(--ease) var(--delay,0ms)}
.js-motion .reveal.in-view{opacity:1;transform:none}
.paused *,.paused *:before,.paused *:after{animation-play-state:paused!important}
@media (prefers-reduced-motion:reduce){.js-motion .reveal{opacity:1;transform:none;transition:none}}

/* responsive */
@media (max-width:1080px){
  .desktop-nav{gap:18px}.desktop-nav a{font-size:14px}
  .hero-grid{grid-template-columns:1fr}
  .hero-stage{max-width:620px;width:100%}
}
@media (max-width:800px){
  .wrap{width:calc(100% - 40px)}
  .desktop-nav,.nav-email{display:none}
  .menu-toggle{display:block}
  .section{padding:84px 0}
  .hero{padding-top:48px}
  .about-grid,.course-grid,.work-grid,.journal-grid,.contact-inner{grid-template-columns:1fr;gap:48px}
  .work-secondary{margin-top:0!important}
  .signal-bar{grid-template-columns:1fr}
  .signal-bar span{border-right:0;border-bottom:1px solid var(--line);padding-left:0}
  .walker{width:72px}
  @keyframes walk{0%{left:0}50%{left:calc(100% - 72px)}100%{left:0}}
  .card-top{width:min(250px,66%);bottom:64px;left:16px}
  .card-bottom,.stage-bottom{display:none}
  .stage-label{left:16px;right:16px;top:16px}
  .term-body strong{font-size:16px}
  .portrait-panel figcaption{display:none}
  .experience{grid-template-columns:1fr}
  .experience div+div{border-left:0;padding-left:0;border-top:1px solid #cfd6d2;padding-top:20px;margin-top:20px}
  .experience div{padding-right:0}
  .course-title{padding:24px 22px 0}
  .course-body{padding:16px 22px 26px}
  .expand{margin:24px 18px 0 0}
  .journal-figure .cat{width:120px}
  .voice-stats{grid-template-columns:1fr}
  .voice-stats div{border-right:0;border-bottom:1px solid var(--line);padding:18px 20px}
  .voice-stats div:last-child{border-bottom:0}
  .voice-tabs{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .voice-tabs button{border-bottom:1px solid var(--line)}
  .voice-tabs button:nth-child(2n){border-right:0}
  .voice-tabs button:nth-last-child(-n+2){border-bottom:0}
  .course-points{grid-template-columns:1fr}
  .course-points li{border-right:0;border-bottom:2px solid var(--night)}
  .course-points li:last-child{border-bottom:0}
  .kinetic-band{margin-top:56px}
}