/* Development-process pages — shares tokens with the portfolio (style.css) */
:root{
  --bg:#0e0e10; --text:#ededec; --muted:rgba(237,237,236,.62); --faint:rgba(237,237,236,.42);
  --line:rgba(255,255,255,.12); --line-strong:rgba(255,255,255,.3); --panel:rgba(255,255,255,.04);
  --header:rgba(14,14,16,.82); --accent:#e0a458; --accent-ink:#1a1206;
  --todo-bg:rgba(224,164,88,.1); --todo-line:rgba(224,164,88,.55);
  --display:"Space Grotesk","Inter",system-ui,sans-serif; --body:"Inter",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --maxw:1180px;
}
html.theme-light{
  --bg:#f3f3f1; --text:#16161a; --muted:rgba(22,22,26,.66); --faint:rgba(22,22,26,.45);
  --line:rgba(22,22,26,.14); --line-strong:rgba(22,22,26,.32); --panel:rgba(22,22,26,.045);
  --header:rgba(243,243,241,.86); --accent:#a8611c; --accent-ink:#fff;
  --todo-bg:rgba(168,97,28,.08); --todo-line:rgba(168,97,28,.5);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:120px}
body{margin:0;background:var(--bg);color:var(--text);font:15.5px/1.7 var(--body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
.hero>*,.phase>*,.grid>*,.step>*,.fix>*{min-width:0}
html,body{overflow-x:clip}
a{color:inherit}
html[data-lang="en"] .l-zh, html[data-lang="zh"] .l-en{display:none!important}
html[data-lang="zh"] body{line-height:1.8}

/* top bar */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px max(16px,calc((100vw - var(--maxw))/2));background:var(--header);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{font:600 15px/1 var(--display);text-decoration:none;white-space:nowrap}
.brand>span{color:var(--muted);font-weight:500;margin-left:6px}
.tools{display:flex;align-items:center;gap:10px}
.tools button,.back{font:500 13px/1 var(--body);color:var(--text);background:none;border:1px solid var(--line);border-radius:6px;padding:7px 11px;cursor:pointer;text-decoration:none}
.lang{display:flex}
.lang button{border-radius:0}
.lang button:first-child{border-radius:6px 0 0 6px}
.lang button:last-child{border-radius:0 6px 6px 0;border-left:0}
.lang button[aria-pressed="true"]{background:var(--text);color:var(--bg);border-color:var(--text)}
.draft{max-width:var(--maxw);margin:14px auto 0;padding:9px 14px;border:1px dashed var(--todo-line);background:var(--todo-bg);border-radius:8px;font-size:13.5px;color:var(--muted);width:calc(100% - 32px)}

/* hero */
.hero{max-width:var(--maxw);margin:0 auto;padding:44px 16px 30px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:44px;align-items:center}
.eyebrow{font:500 12px/1 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin:0 0 12px}
h1{font:700 clamp(34px,4.6vw,56px)/1.04 var(--display);margin:0 0 16px;letter-spacing:-.01em}
.tagline{font-size:17px;color:var(--muted);margin:0 0 24px;max-width:60ch}
.meta{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px 22px;margin:0 0 22px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.meta dt{font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.meta dd{margin:2px 0 0;font-size:14.5px}
.meta .todo{margin:6px 0 0;padding:5px 8px;font-size:12.5px}
.links{display:flex;flex-wrap:wrap;gap:10px}
.btn{font:500 14px/1 var(--body);text-decoration:none;padding:10px 16px;border-radius:7px;border:1px solid var(--line-strong)}
.btn:first-child{background:var(--text);color:var(--bg);border-color:var(--text)}
.cover img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.cover-hole{aspect-ratio:16/10;border:1px dashed var(--todo-line);background:var(--todo-bg);border-radius:10px;display:grid;place-items:center;color:var(--muted);font-size:14px}

/* phase bar */
.phasebar{position:sticky;top:53px;z-index:20;background:var(--header);backdrop-filter:blur(12px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.phasebar-in{max-width:var(--maxw);margin:0 auto;padding:0 16px;display:flex;gap:2px;overflow-x:auto;scrollbar-width:none}
.phasebar-in::-webkit-scrollbar{display:none}
.phasebar a{flex:none;display:flex;align-items:baseline;gap:6px;padding:14px 13px 12px;text-decoration:none;font-size:13.5px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}
.phasebar a .num{font:500 11px/1 var(--display);color:var(--faint)}
.phasebar a:hover{color:var(--text)}
.phasebar a.on{color:var(--text);border-bottom-color:var(--accent)}
.phasebar a.on .num{color:var(--accent)}

/* timeline */
.timeline-wrap{max-width:var(--maxw);margin:0 auto;padding:4px 16px 28px;overflow-x:auto}
.timeline{list-style:none;margin:0;padding:0;display:flex;min-width:max-content;gap:0}
.timeline li{position:relative;padding:18px 26px 0 0;min-width:170px;max-width:220px}
.timeline li::before{content:"";position:absolute;left:0;right:0;top:5px;height:1px;background:var(--line-strong)}
.timeline li::after{content:"";position:absolute;left:0;top:1px;width:9px;height:9px;border-radius:50%;background:var(--accent)}
.timeline li.q::after{background:var(--bg);border:1px dashed var(--todo-line)}
.timeline .d{display:block;font:600 13px/1.3 var(--display)}
.timeline li.q .d{color:var(--accent)}
.timeline .e{display:block;font-size:13px;color:var(--muted);line-height:1.45;margin-top:3px}

/* phases */
main{max-width:var(--maxw);margin:0 auto;padding:10px 16px 40px}
.phase{display:grid;grid-template-columns:230px minmax(0,1fr);gap:40px;padding:44px 0;border-bottom:1px solid var(--line)}
html.js .phase{display:none;border-bottom:0}
html.js .phase.on{display:grid;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
html:not(.js) .pager{display:none}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line)}
.pg{display:flex;flex-direction:column;gap:3px;text-decoration:none;padding:10px 14px;border:1px solid var(--line);border-radius:8px;max-width:48%}
.pg.next{text-align:right;margin-left:auto}
.pg small{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint)}
.pg span{font:600 14.5px/1.35 var(--display)}
.pg:hover{border-color:var(--accent)}

.phase>header{align-self:start;position:sticky;top:130px}
.phase .num{font:500 13px/1 var(--display);color:var(--accent)}
.phase h2{font:700 25px/1.15 var(--display);margin:8px 0 6px}
.phase .when{font-size:13px;color:var(--faint)}
.body{max-width:820px;min-width:0}
.body>p,.step-b>p{margin:0 0 14px}
.body h3{font:600 17px/1.3 var(--display);margin:30px 0 12px}
.body h3:first-child{margin-top:0}
.body ul{margin:0 0 16px;padding-left:20px}
.body li{margin:5px 0}
.body ul.facts{list-style:none;padding:0;display:grid;gap:8px}
.body ul.facts li{margin:0;padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:8px}
blockquote{margin:0 0 22px;padding:4px 0 4px 18px;border-left:2px solid var(--accent);font-size:17px;color:var(--text)}
figure{margin:0 0 18px}
figure img{width:100%;border-radius:8px;border:1px solid var(--line);background:#fff}
figure.narrow{max-width:560px}
figcaption{font-size:12.5px;color:var(--faint);margin-top:7px;line-height:1.45}
.grid{display:grid;gap:14px;margin-bottom:6px}
.grid.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.c3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.c4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid figure img{aspect-ratio:auto}
.hole div{aspect-ratio:16/10;border:1px dashed var(--todo-line);background:var(--todo-bg);border-radius:8px;display:grid;place-items:center;color:var(--muted);font-size:13px;text-align:center;padding:8px}
.mobs figure img{aspect-ratio:1/1;object-fit:contain;background:#12151a}
.mobs figcaption{min-height:2.6em}
.docs figure img{background:#fff;border-color:var(--line-strong);transition:transform .15s ease}
.docs a{display:block}
.docs a:hover img{transform:translateY(-2px);border-color:var(--accent)}
.segs{display:grid;gap:12px;margin:0 0 18px}
.seg{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 18px}
.seg-h{display:flex;align-items:baseline;gap:10px;margin-bottom:8px;flex-wrap:wrap}
.seg-h .tag{flex:none;font:700 12px/1 var(--display);color:var(--accent-ink);background:var(--accent);border-radius:5px;padding:5px 8px}
.seg-h b{font:600 15.5px/1.35 var(--display)}
.seg>p{margin:0 0 12px;max-width:none}
.seg figure{margin:0}
.step{display:grid;grid-template-columns:150px minmax(0,1fr);gap:18px;padding:16px 0;border-top:1px dashed var(--line)}
.step-t{font:600 14.5px/1.4 var(--display)}
.fix{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:0 0 14px}
.fix>div{background:var(--bg);padding:12px 14px;font-size:14.5px}
.fix>div:last-child{background:var(--panel)}
.fix .k{display:block;font:600 11px/1 var(--body);letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-bottom:6px}
.fix>div:last-child .k{color:var(--accent)}
.tbl{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:8px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font:600 12px/1.3 var(--body);letter-spacing:.06em;text-transform:uppercase;color:var(--faint);background:var(--panel)}
tr:last-child td{border-bottom:0}
td:first-child{white-space:nowrap;font-weight:500}
.video .ratio{position:relative;aspect-ratio:16/9;border-radius:8px;overflow:hidden;border:1px solid var(--line);background:#000}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.names{list-style:none;padding:0!important;display:flex;flex-wrap:wrap;gap:8px}
.names li{margin:0!important;padding:5px 11px;border:1px solid var(--line);border-radius:999px;font-size:14px}
.todo{display:flex;gap:10px;align-items:baseline;margin:0 0 14px;padding:10px 12px;border:1px dashed var(--todo-line);background:var(--todo-bg);border-radius:8px;font-size:14px;color:var(--muted)}
.todo b{color:var(--accent);font-weight:600}
.todo-id{flex:none;font:600 11px/1.6 ui-monospace,Consolas,monospace;color:var(--accent-ink);background:var(--accent);border-radius:4px;padding:0 6px}
.foot{max-width:var(--maxw);margin:0 auto;padding:20px 16px 60px;color:var(--faint);font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot p{margin:0}

@media (max-width:900px){
  .hero{grid-template-columns:minmax(0,1fr);gap:26px;padding-top:28px}
  .cover{order:-1}
  .phase{grid-template-columns:minmax(0,1fr);gap:14px;padding:36px 0}
  .phase>header{position:static}
  .grid.c4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:600px){
  .brand>span{display:none}
  .topbar{gap:8px}
  .tools{gap:6px}
  .tools button,.back{padding:6px 8px}
  .meta{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline li{min-width:150px}
  .grid.c2,.grid.c3{grid-template-columns:minmax(0,1fr)}
  .step{grid-template-columns:minmax(0,1fr);gap:6px}
  .fix{grid-template-columns:minmax(0,1fr)}
  td:first-child{white-space:normal}
}

/* lightbox */
.lbx{position:fixed;inset:0;z-index:60;background:rgba(8,9,11,.93);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:clamp(12px,3vw,40px)}
.lbx[hidden]{display:none}
.lbx-fig{margin:0;max-width:min(1500px,94vw);display:flex;flex-direction:column;align-items:center;gap:10px}
.lbx-fig img{max-width:100%;max-height:82vh;width:auto;height:auto;object-fit:contain;border-radius:8px;border:1px solid var(--line-strong);background:#fff;cursor:zoom-out}
.lbx-fig figcaption{display:flex;gap:14px;align-items:baseline;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:13.5px;line-height:1.5;text-align:center;max-width:90ch}
.lbx-n{color:var(--faint);font:500 12.5px/1 var(--display);white-space:nowrap}
.lbx-x,.lbx-nav{position:absolute;z-index:2;background:rgba(255,255,255,.07);border:1px solid var(--line);color:var(--text);border-radius:8px;cursor:pointer;line-height:1;padding:0}
.lbx-x{top:16px;right:16px;width:40px;height:40px;font-size:26px}
.lbx-nav{top:50%;transform:translateY(-50%);width:46px;height:64px;font-size:30px}
.lbx-prev{left:14px}.lbx-next{right:14px}
.lbx-x:hover,.lbx-nav:hover{background:rgba(255,255,255,.16);border-color:var(--line-strong)}
figure img{cursor:zoom-in}
.hole div,.cover-hole{cursor:default}
@media (max-width:600px){.lbx-nav{width:38px;height:52px;font-size:24px}.lbx-fig img{max-height:70vh}}