/* Tayang app flow board */
:root{
  --bg:#FFFFFF;--bg-2:#FAFAFA;--bg-3:#F4F4F5;
  --ink:#0A0A0B;--ink-2:#3F3F46;--muted:#71717A;--faint:#A1A1AA;
  --line:#EAEAEC;--line-2:#F1F1F3;
  --signal:#FF4321;--signal-soft:#FFF1EC;--warn:#C27803;--warn-soft:#FFF6E5;
  --display:"Space Grotesk","Segoe UI",system-ui,sans-serif;
  --sans:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --ease:cubic-bezier(.16,1,.3,1);
  --sh-lg:0 1px 1px rgba(0,0,0,.02),0 8px 16px -8px rgba(0,0,0,.08),0 32px 64px -24px rgba(0,0,0,.18);
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg-2);color:var(--ink);font:14px/1.5 var(--sans);-webkit-font-smoothing:antialiased;overflow:hidden;overscroll-behavior:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;border-radius:8px}
[hidden]{display:none!important}

/* top bar */
.fb-top{position:fixed;left:0;right:0;top:0;z-index:30;height:58px;display:flex;align-items:center;gap:14px;padding:0 16px;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.logo{display:inline-flex;align-items:center;gap:9px;font:600 18px/1 var(--display);letter-spacing:-.04em}
.sep{width:1px;height:22px;background:var(--line)}
.ttl b{display:block;font:600 14px/1.2 var(--display)}
.ttl small{display:block;font:11.5px var(--mono);color:var(--muted)}
.seg{display:inline-flex;padding:3px;border-radius:10px;background:var(--bg-3);gap:2px;margin-left:12px}
.seg button{border:0;background:transparent;height:30px;padding:0 12px;border-radius:8px;cursor:pointer;font-size:13px;font-weight:500;color:var(--muted);transition:all .2s}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08),0 0 0 1px rgba(0,0,0,.03)}
.tools{margin-left:auto;display:flex;align-items:center;gap:6px}
.ib{width:32px;height:32px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:17px;line-height:1;display:grid;place-items:center}
.ib:hover{background:var(--bg-2)}
.zl{min-width:56px;height:32px;border:0;background:transparent;font:500 12.5px var(--mono);cursor:pointer;color:var(--ink-2)}
.tb{display:inline-flex;align-items:center;height:32px;padding:0 12px;border-radius:8px;border:1px solid var(--line);background:#fff;font-size:13px;font-weight:500;cursor:pointer;white-space:nowrap}
.tb:hover{background:var(--bg-2)}
.tb.dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.tb.dark:hover{background:#26262a}

/* viewport + world */
.vp{position:fixed;inset:58px 0 0;overflow:hidden;cursor:grab;touch-action:none;background-color:var(--bg-2);background-image:radial-gradient(rgba(10,10,11,.13) 1px,transparent 1px);background-size:24px 24px}
.vp.drag{cursor:grabbing}
.world{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}
.world.anim{transition:transform .8s var(--ease)}
.edges{position:absolute;left:0;top:0;overflow:visible;pointer-events:none}

/* section frames */
.sec{position:absolute;border-radius:28px;background:rgba(255,255,255,.55);border:1px solid var(--line);transition:opacity .4s}
.sec .sl{position:absolute;left:6px;bottom:calc(100% + 12px);display:flex;align-items:baseline;gap:10px;white-space:nowrap;transform:scale(var(--k,1));transform-origin:left bottom}
.sec .sl em{font:600 12px/1 var(--mono);font-style:normal;color:var(--signal);letter-spacing:.06em}
.sec .sl b{font:600 22px/1 var(--display);letter-spacing:-.03em}
.sec .sl span{font-size:14px;color:var(--muted)}
.world.far .sec .sl span{display:none}

/* screen nodes */
.node{position:absolute;width:320px;cursor:pointer;transition:opacity .4s,filter .4s}
.node .nh{display:flex;align-items:center;gap:8px;height:28px;margin-bottom:6px;white-space:nowrap}
.node .no{font:600 11px/1 var(--mono);padding:4px 6px;border-radius:6px;background:var(--ink);color:#fff}
.node .nh b{font:600 14.5px/1 var(--display);letter-spacing:-.02em;overflow:hidden;text-overflow:ellipsis}
.node .nh small{margin-left:auto;font:11px var(--mono);color:var(--faint)}
.node .fr{position:relative;height:200px;border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 0 0 1px rgba(10,10,11,.08),0 2px 4px rgba(0,0,0,.04),0 18px 36px -18px rgba(0,0,0,.28);transition:box-shadow .3s,transform .4s var(--ease)}
.node .fr img{display:block;width:100%;height:100%;object-fit:cover;object-position:top left}
.node:hover .fr{transform:translateY(-3px);box-shadow:0 0 0 1px rgba(10,10,11,.12),0 24px 44px -18px rgba(0,0,0,.35)}
.node.main .no{background:var(--signal)}
.node.sel .fr{box-shadow:0 0 0 2px var(--signal),0 0 0 7px rgba(255,67,33,.15),0 24px 44px -18px rgba(0,0,0,.35)}
.node.cur .fr{box-shadow:0 0 0 2px var(--signal),0 0 0 10px rgba(255,67,33,.12),0 30px 60px -20px rgba(0,0,0,.35)}
.node.note .fr{display:grid;align-content:center;gap:10px;padding:22px;background:var(--warn-soft);box-shadow:0 0 0 1px #F2D9A8}
.node.note .fr b{font:600 18px/1.15 var(--display);letter-spacing:-.02em}
.node.note .fr p{margin:0;font-size:13px;color:var(--ink-2)}
.node.note .fr code{display:block;font:11.5px/1.6 var(--mono);background:#0B0C0E;color:#FCA5A5;border-radius:8px;padding:8px 10px;white-space:pre}
.node.note .no{background:var(--warn)}
.dec{position:absolute;width:176px;height:72px;display:grid;place-items:center;text-align:center;border-radius:18px;background:#fff;border:1.5px dashed var(--ink);font:600 14px/1.2 var(--display);transition:opacity .4s}
.dec small{display:block;font:500 11px var(--mono);color:var(--muted);margin-top:3px}
.dec::before,.dec::after{content:"";position:absolute;width:10px;height:10px;border-radius:50%;background:var(--ink);top:50%;margin-top:-5px}
.dec::before{left:-6px}.dec::after{right:-6px}

/* edges */
.edges path{fill:none;stroke-linecap:round;stroke-linejoin:round;transition:opacity .4s}
.e-main{stroke:#FF4321;stroke-width:2.5}
.e-alt{stroke:#52525B;stroke-width:1.6;stroke-dasharray:7 6;opacity:.75}
.e-err{stroke:#C27803;stroke-width:1.8;stroke-dasharray:4 5}
.e-ret{stroke:#A1A1AA;stroke-width:1.6;stroke-dasharray:2 6}
.edges circle{fill:#FF4321}
.el{position:absolute;transform:translate(-50%,-50%);padding:4px 8px;border-radius:7px;background:#fff;border:1px solid var(--line);font:500 11.5px/1.2 var(--sans);color:var(--ink-2);white-space:nowrap;pointer-events:none;box-shadow:0 2px 6px -2px rgba(0,0,0,.08);transition:opacity .4s}
.el.main{border-color:#FFC9B8;color:#C2310F;background:#FFF7F4}
.el.err{border-color:#F2D9A8;color:#8A5400;background:var(--warn-soft)}
.el.ret{color:var(--muted)}

/* main-path mode */
body.happy .node:not(.main),body.happy .dec:not(.main){opacity:.18;filter:grayscale(1)}
body.happy .edges path:not(.e-main),body.happy .el:not(.main){opacity:.08}
body.happy .sec{opacity:.6}

/* legend, tour, minimap, hint */
.legend{position:fixed;left:16px;bottom:16px;z-index:20;display:flex;gap:14px;flex-wrap:wrap;padding:9px 14px;border-radius:12px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border:1px solid var(--line);font-size:12px;color:var(--ink-2);box-shadow:0 8px 24px -14px rgba(0,0,0,.25)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{width:26px;height:0;border-top:2.5px solid var(--signal)}
.legend .l-alt{border-top:1.6px dashed #52525B}
.legend .l-err{border-top:1.8px dashed var(--warn)}
.legend .l-ret{border-top:1.8px dotted #A1A1AA}
.tour{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:20;display:flex;align-items:center;gap:4px;padding:5px;border-radius:14px;background:rgba(10,10,11,.92);color:#fff;box-shadow:0 16px 40px -12px rgba(0,0,0,.5)}
.tour button{border:0;background:transparent;color:#fff;height:34px;min-width:34px;border-radius:9px;cursor:pointer;font-size:18px;line-height:1}
.tour button:hover{background:rgba(255,255,255,.1)}
.tour .tl{display:flex;align-items:center;gap:9px;padding:0 12px;font-size:13px;font-weight:500}
.tour .tl i{width:7px;height:7px;border-radius:50%;background:var(--signal);box-shadow:0 0 0 3px rgba(255,67,33,.25)}
.tour .tl em{font:500 11px var(--mono);font-style:normal;color:#A1A1AA}
.mini{position:fixed;right:16px;bottom:16px;z-index:20;width:220px;height:64px;border-radius:12px;background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:0 8px 24px -14px rgba(0,0,0,.25);cursor:pointer}
.hint{position:fixed;left:50%;top:72px;transform:translateX(-50%);z-index:20;margin:0;padding:6px 12px;border-radius:999px;background:rgba(10,10,11,.8);color:#fff;font-size:12px;pointer-events:none;transition:opacity .6s;white-space:nowrap}
.hint.off{opacity:0}

/* drawer */
.drawer{position:fixed;right:0;top:58px;bottom:0;z-index:40;width:min(460px,100vw);background:#fff;border-left:1px solid var(--line);box-shadow:var(--sh-lg);transform:translateX(102%);transition:transform .5s var(--ease);display:flex;flex-direction:column}
.drawer.on{transform:none}
.dr-h{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line-2)}
.dr-h .no{font:600 12px/1 var(--mono);padding:5px 7px;border-radius:7px;background:var(--ink);color:#fff}
.dr-h b{display:block;font:600 17px/1.2 var(--display);letter-spacing:-.02em}
.dr-h small{display:block;font-size:12.5px;color:var(--muted)}
.dr-h .ib{margin-left:auto}
.dr-img{padding:16px 18px 0}
.dr-img img{display:block;width:100%;border-radius:12px;box-shadow:0 0 0 1px var(--line),0 12px 30px -16px rgba(0,0,0,.3)}
.dr-b{padding:16px 18px 24px;display:grid;gap:16px;overflow-y:auto}
.dr-b p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.6}
.dr-g small{display:block;font:500 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--faint);margin-bottom:8px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips button{height:30px;padding:0 10px;border-radius:8px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:12.5px;display:inline-flex;align-items:center;gap:6px}
.chips button:hover{background:var(--bg-2)}
.chips button i{width:8px;height:0;border-top:2px solid currentColor}
.chips .main i{color:var(--signal)}.chips .err i{color:var(--warn)}.chips .alt i{color:#52525B}.chips .ret i{color:#A1A1AA}
.chips .none{font-size:12.5px;color:var(--faint)}
.dr-b .tb{justify-content:center;height:40px}

@media (max-width:820px){
  .ttl,.sep,.legend,.zl,#fit,.tools .ib{display:none}
  .seg button{padding:0 9px;white-space:nowrap;font-size:12.5px}
  .seg{margin-left:0}
  .fb-top{gap:8px;padding:0 10px}
  .fb-top .logo{font-size:0;gap:0}
  .tools .tb.dark{padding:0 10px;font-size:12px}
  .mini{display:none}
  .drawer{top:auto;height:78vh;width:100%;border-left:0;border-top:1px solid var(--line);border-radius:18px 18px 0 0;transform:translateY(102%)}
  .drawer.on{transform:none}
  .tour .tl span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hint{top:66px;font-size:11px;white-space:normal;text-align:center;width:max-content;max-width:calc(100vw - 24px)}
}
@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important}}

/* empty-state mode */
.fr{position:relative}
.fr .es-tag{position:absolute;left:8px;top:8px;padding:3px 8px;border-radius:6px;background:var(--ink);color:#fff;font:500 9px/1.2 var(--mono);letter-spacing:.02em;opacity:0;transform:translateY(-3px);transition:opacity .3s,transform .3s}
body.empty .has-st .fr .es-tag{opacity:1;transform:none}
body.empty .node:not(.has-st){opacity:.35;transition:opacity .3s}
body.empty .node:not(.has-st):hover{opacity:1}
@media (max-width:820px){ #dmode{display:none} }