:root{
  --land:#F2F0EB; --ink:#1C1C1E; --ink2:#6C6C72; --ink3:#9A9AA0; --sep:rgba(60,60,67,.12);
  --panel:rgba(255,255,255,.86); --panel-solid:#FFFFFF; --panel-edge:rgba(0,0,0,.06);
  --chip:#EEEEF1; --chip-on:#1C1C1E; --chip-on-ink:#FFFFFF; --hover:rgba(120,120,128,.10);
  --accent:#0A7AFF; --shadow:0 8px 28px rgba(0,0,0,.14),0 1px 3px rgba(0,0,0,.08);
  --route:#2E4FA8; --hot:#E0542E; --field:rgba(118,118,128,.12); --bar:rgba(224,84,46,.16);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --land:#1F2124; --ink:#F2F2F7; --ink2:#A1A1A8; --ink3:#6E6E75; --sep:rgba(235,235,245,.12);
    --panel:rgba(36,37,40,.86); --panel-solid:#242528; --panel-edge:rgba(255,255,255,.07);
    --chip:#35363A; --chip-on:#F2F2F7; --chip-on-ink:#1C1C1E; --hover:rgba(160,160,170,.14);
    --accent:#3D9BFF; --shadow:0 8px 28px rgba(0,0,0,.5),0 1px 3px rgba(0,0,0,.4);
    --route:#7FB2FF; --hot:#FF9F5A; --field:rgba(118,118,128,.24); --bar:rgba(255,159,90,.18);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --land:#1F2124; --ink:#F2F2F7; --ink2:#A1A1A8; --ink3:#6E6E75; --sep:rgba(235,235,245,.12);
  --panel:rgba(36,37,40,.86); --panel-solid:#242528; --panel-edge:rgba(255,255,255,.07);
  --chip:#35363A; --chip-on:#F2F2F7; --chip-on-ink:#1C1C1E; --hover:rgba(160,160,170,.14);
  --accent:#3D9BFF; --shadow:0 8px 28px rgba(0,0,0,.5),0 1px 3px rgba(0,0,0,.4);
  --route:#7FB2FF; --hot:#FF9F5A; --field:rgba(118,118,128,.24); --bar:rgba(255,159,90,.18);
  color-scheme:dark;
}
html,body{height:100%}
body{margin:0;background:var(--land);color:var(--ink);font:14px/1.35 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue","PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","Hiragino Sans","Yu Gothic","Noto Sans JP","Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow:hidden}
#app{position:fixed;inset:0}
#map{position:absolute;inset:0}
.maplibregl-canvas-container.maplibregl-interactive.pointer{cursor:pointer}

/* ---------- panel ---------- */
#panel{position:absolute;left:16px;top:calc(16px + env(safe-area-inset-top,0px));width:356px;max-width:calc(100% - 32px);max-height:calc(100% - 32px - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;background:var(--panel);backdrop-filter:saturate(180%) blur(22px);-webkit-backdrop-filter:saturate(180%) blur(22px);border:1px solid var(--panel-edge);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;z-index:5}
.grip{display:none}
.phead{padding:12px 12px 8px;display:flex;flex-direction:column;gap:10px;border-bottom:1px solid transparent}
.phead.scrolled{border-bottom-color:var(--sep)}
.search{position:relative;display:flex;align-items:center}
.search svg{position:absolute;left:9px;width:15px;height:15px;color:var(--ink3);pointer-events:none}
#q{width:100%;box-sizing:border-box;height:36px;border:0;border-radius:10px;background:var(--field);color:var(--ink);font:inherit;font-size:15px;padding:0 32px 0 31px;outline:none}
#q::placeholder{color:var(--ink3)}
#q::-webkit-search-cancel-button{-webkit-appearance:none;display:none}
#q:focus-visible{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 35%,transparent)}
#qclear{position:absolute;right:6px;width:22px;height:22px;border-radius:11px;border:0;background:var(--ink3);color:var(--panel-solid);font-size:13px;line-height:22px;padding:0;cursor:pointer;display:none}
#qclear.show{display:block}
#body{overflow-y:auto;overscroll-behavior:contain;padding:0 0 10px;flex:1 1 auto;min-height:0}
.intro{padding:2px 16px 10px}
.intro h1{margin:0;font-size:21px;line-height:1.2;font-weight:700;letter-spacing:-.015em}
.intro p{margin:4px 0 0;font-size:13px;color:var(--ink2);text-wrap:pretty}
.sec{padding:12px 16px 4px;font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--ink2)}
.row{position:relative;display:flex;align-items:center;gap:10px;width:100%;box-sizing:border-box;padding:7px 16px;border:0;background:none;color:inherit;font:inherit;text-align:left;cursor:pointer}
.row:hover,.row.hl{background:var(--hover)}
.row .t{flex:1;min-width:0}
.row .t b{display:block;font-weight:600;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .t span{display:block;font-size:12.5px;color:var(--ink2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .n{font-size:13px;color:var(--ink2);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.row .n small{display:block;font-size:11px;color:var(--ink3)}
.row .bar{position:absolute;left:16px;bottom:2px;height:3px;max-width:calc(100% - 32px);background:var(--hot);opacity:.55;border-radius:2px;pointer-events:none}
.row>*:not(.bar){position:relative}
.code{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:22px;padding:0 5px;box-sizing:border-box;border-radius:6px;background:var(--chip);color:var(--ink);font:600 12px/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;letter-spacing:.02em;flex:none}
.code.big{min-width:56px;height:34px;font-size:16px;border-radius:9px}
.est{color:var(--ink3);font-weight:400}
/* airports without airline flights: grey and italic */
.row.other .t b,.dhead.other h2{font-style:italic;font-weight:500;color:var(--ink2)}
.row.other .code,.dhead.other .code{font-style:italic;color:var(--ink3);background:none;box-shadow:inset 0 0 0 1px var(--sep)}
.row.other .n small{color:var(--ink3);line-height:1.2}
#tip i{color:var(--ink2)}
.chips{display:flex;flex-wrap:wrap;gap:6px;padding:2px 16px 4px}
.chip{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 10px;border-radius:14px;border:0;background:var(--chip);color:var(--ink);font:inherit;font-size:12.5px;font-weight:500;cursor:pointer;white-space:nowrap}
.chip[aria-pressed="false"]{color:var(--ink3)}
.chip:focus-visible,.row:focus-visible,.back:focus-visible,.seg button:focus-visible,.ctl button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.seg{display:inline-flex;background:var(--field);border-radius:8px;padding:2px;gap:2px}
.seg button{border:0;background:none;color:var(--ink2);font:inherit;font-size:12px;font-weight:500;padding:4px 9px;border-radius:6px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--panel-solid);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.12)}
.opts{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:4px 16px 4px;font-size:12.5px;color:var(--ink2)}
.stats{display:flex;justify-content:space-between;gap:10px;padding:4px 16px 6px}
.stats div{display:flex;flex-direction:column;min-width:0;white-space:nowrap}
.stats b{font-size:19px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.stats span{font-size:11px;color:var(--ink2)}
.note{padding:8px 16px;font-size:12.5px;color:var(--ink2);text-wrap:pretty}
.note a{color:var(--accent)}
.note.small{font-size:11.5px;color:var(--ink3)}

/* detail */
.back{display:inline-flex;align-items:center;gap:4px;border:0;background:none;color:var(--accent);font:inherit;font-size:14px;cursor:pointer;padding:4px 12px 0}
.back svg{width:9px;height:14px}
.dhead{display:flex;gap:12px;align-items:flex-start;padding:10px 16px 6px}
.dhead h2{margin:0;font-size:19px;line-height:1.2;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
.dhead .sub{font-size:14px;color:var(--ink2);margin-top:2px}
.route-ends{display:flex;align-items:center;gap:8px;padding:10px 16px 4px}
.route-ends .arrow{color:var(--ink3);font-size:18px}
.kv{display:grid;grid-template-columns:auto 1fr;gap:5px 14px;padding:6px 16px;font-size:13.5px}
.kv dt{color:var(--ink2)}
.kv dd{margin:0;font-variant-numeric:tabular-nums}
.airlines{padding:2px 16px 8px;font-size:13.5px;line-height:1.5}
.dhead h2,.dhead .sub,.row .t b,.row .t span{unicode-bidi:plaintext;text-align:left}
.dhead h2 a.wiki{color:inherit;text-decoration:none}
.dhead h2 a.wiki svg{display:inline-block;width:.62em;height:.62em;margin-left:.3em;vertical-align:.08em;color:var(--ink3)}
.dhead h2 a.wiki:hover{text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:1.5px;text-underline-offset:.15em}
.dhead h2 a.wiki:hover svg{color:var(--accent)}
.dhead h2 a.wiki:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:3px}
#lines[aria-pressed="false"]{color:var(--ink3)}
#lines[aria-pressed="false"] svg{opacity:.5}

/* ---------- map controls ---------- */
.ctl{position:absolute;right:16px;top:calc(16px + env(safe-area-inset-top,0px));display:flex;flex-direction:column;gap:10px;z-index:4}
.ctl .grp{display:flex;flex-direction:column;background:var(--panel);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--panel-edge);border-radius:10px;box-shadow:var(--shadow);overflow:hidden}
.ctl button{width:40px;height:40px;border:0;background:none;color:var(--ink);cursor:pointer;display:grid;place-items:center}
.ctl button+button{border-top:1px solid var(--sep)}
.ctl button:hover{background:var(--hover)}
.ctl svg{width:16px;height:16px}
#tip{position:absolute;z-index:6;pointer-events:none;background:var(--panel-solid);color:var(--ink);border:1px solid var(--panel-edge);border-radius:8px;box-shadow:var(--shadow);padding:6px 9px;font-size:12.5px;line-height:1.35;max-width:260px;opacity:0;transform:translate(-50%,calc(-100% - 12px));transition:opacity .12s}
#tip.show{opacity:1}
#tip b{font-weight:600}
#tip span{color:var(--ink2)}
.attr{position:absolute;right:8px;bottom:calc(6px + env(safe-area-inset-bottom,0px));font-size:10.5px;color:var(--ink2);background:var(--panel);padding:2px 7px;border-radius:6px;z-index:3}
.attr a{color:inherit}
#loading{position:absolute;inset:0;display:grid;place-items:center;z-index:10;background:var(--land);transition:opacity .4s}
#loading.done{opacity:0;pointer-events:none}
#loading div{font-size:14px;color:var(--ink2);display:flex;flex-direction:column;align-items:center;gap:12px}
#loading .bar{width:180px;height:4px;border-radius:2px;background:var(--field);overflow:hidden}
#loading .bar i{display:block;height:100%;width:30%;background:var(--accent);border-radius:2px;animation:ld 1.1s ease-in-out infinite}
@keyframes ld{0%{transform:translateX(-100%)}100%{transform:translateX(330%)}}
@media (prefers-reduced-motion:reduce){#loading .bar i{animation:none;width:100%}}

/* ---------- phone: bottom sheet ---------- */
@media (max-width:640px){
  #panel{left:0;right:0;top:auto;bottom:0;width:auto;max-width:none;border-radius:16px 16px 0 0;max-height:52%;padding-bottom:env(safe-area-inset-bottom,0px);border-left:0;border-right:0;border-bottom:0}
  #panel.min{max-height:128px}
  #panel.min #body{overflow:hidden}
  .grip{display:block;width:100%;height:18px;border:0;background:none;cursor:pointer;padding:0;flex:none}
  .grip::before{content:"";display:block;width:36px;height:5px;border-radius:3px;background:var(--ink3);opacity:.5;margin:7px auto 0}
  .phead{padding-top:0}
  .attr{bottom:auto;top:calc(8px + env(safe-area-inset-top,0px));left:8px;right:auto}
  .attr .wide{display:none}
  .ctl{top:auto;bottom:calc(52% + 12px)}
  #tip{display:none}
}