:root{--bg:#f4f6fb;--s1:#fff;--s2:#eef2f9;--tx:#0e1626;--mut:#5a6b82;--bd:#dce3ee;--ac:#3366f0;--ac2:#7a4dff;--good:#119a4e;--warn:#b86e00;--bad:#d4281c;--sh:0 1px 2px rgba(15,23,42,.05),0 10px 28px rgba(15,23,42,.06);--hh:58px;box-sizing:border-box;color-scheme:light}
:root[data-theme="dark"]{--bg:#0a0f1a;--s1:#121a29;--s2:#1a2438;--tx:#e8eef8;--mut:#8ea0b8;--bd:#24324a;--ac:#6f95ff;--ac2:#a78bff;--good:#3ecf7e;--warn:#f1b24a;--bad:#ff7a6e;--sh:0 1px 2px rgba(0,0,0,.3),0 10px 28px rgba(0,0,0,.25);color-scheme:dark}
@media(prefers-color-scheme:dark){:root:not([data-theme]){--bg:#0a0f1a;--s1:#121a29;--s2:#1a2438;--tx:#e8eef8;--mut:#8ea0b8;--bd:#24324a;--ac:#6f95ff;--ac2:#a78bff;--good:#3ecf7e;--warn:#f1b24a;--bad:#ff7a6e;--sh:0 1px 2px rgba(0,0,0,.3),0 10px 28px rgba(0,0,0,.25);color-scheme:dark}}
*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--ac)}h1,h2,h3{line-height:1.2}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 84%,transparent);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--bd)}
.hin{max-width:1100px;margin:0 auto;padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top,0px));display:flex;align-items:center;gap:10px}
.logo{font-weight:800;font-size:18px;letter-spacing:-.02em;text-decoration:none;color:var(--tx)}.logo b{color:var(--ac)}
.nav{display:flex;gap:2px;margin-left:14px}.nav a{padding:7px 13px;border-radius:999px;text-decoration:none;color:var(--mut);font-weight:600;font-size:14px}.nav a:hover{background:var(--s2);color:var(--tx)}.nav a.on{background:var(--s2);color:var(--ac)}
.tools{margin-left:auto;display:flex;gap:8px}
.pill{font:600 13px system-ui;border:1px solid var(--bd);background:var(--s1);color:var(--tx);border-radius:999px;padding:7px 12px;cursor:pointer}.pill:hover{border-color:var(--ac)}
.tabs{display:none}
@media(max-width:760px){.nav{display:none}.tabs{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:60;background:color-mix(in srgb,var(--s1) 92%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--bd);padding-bottom:env(safe-area-inset-bottom,0px)}
 .tabs>*{flex:1;min-width:0;text-align:center;padding:7px 2px 6px;font:600 11px system-ui;color:var(--mut);text-decoration:none;background:none;border:0;cursor:pointer}.tabs>* span{display:block;font-size:21px;line-height:1.2}.tabs .on{color:var(--ac)}
 body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}}
/* layout */
.wrap{max-width:1100px;margin:0 auto;padding:18px 16px 36px}
.pagehead h1{font-size:clamp(26px,5vw,40px);letter-spacing:-.025em;margin:6px 0 6px}.pagehead p{color:var(--mut);max-width:700px;margin:0 0 18px}
.card{scroll-margin-top:calc(var(--hh) + 18px);background:var(--s1);border:1px solid var(--bd);border-radius:20px;padding:16px;margin-bottom:14px;box-shadow:var(--sh)}
.card h2{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--mut);margin:0 0 12px}
.card h3{margin:0 0 6px;font-size:17px}
details.card>summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center}details.card>summary::-webkit-details-marker{display:none}details.card>summary:after{content:"＋";color:var(--mut)}details.card[open]>summary:after{content:"－"}details.card[open]>summary{margin-bottom:12px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grid .wide{grid-column:1/-1}
@media(min-width:1000px){.grid.g3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.fld{display:flex;flex-direction:column;justify-content:flex-end;gap:5px;font-size:12px;font-weight:600;color:var(--mut)}.fld>span{display:flex;align-items:center;flex-wrap:wrap;min-height:22px;line-height:1.25}
.fld input,.fld select{font:inherit;font-size:16px;font-weight:500;color:var(--tx);padding:0 12px;height:46px;border:1px solid var(--bd);border-radius:12px;background:var(--s2);width:100%;min-width:0;appearance:none;-webkit-appearance:none}
.fld select{background-image:linear-gradient(45deg,transparent 50%,var(--mut) 50%),linear-gradient(135deg,var(--mut) 50%,transparent 50%);background-position:calc(100% - 18px) 55%,calc(100% - 13px) 55%;background-size:5px 5px;background-repeat:no-repeat;padding-right:32px}
.fld input:focus,.fld select:focus{outline:2px solid var(--ac);outline-offset:1px;background:var(--s1)}
.note{font-size:13px;color:var(--mut);margin:-4px 0 0}
.split{display:grid;gap:18px}
@media(min-width:960px){.split{grid-template-columns:minmax(0,1fr) 440px;align-items:start}.sticky{position:sticky;top:calc(var(--hh) + 14px)}}
/* results */
.board{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.tile{border:1px solid var(--bd);border-radius:16px;padding:12px 4px 10px;text-align:center;background:linear-gradient(180deg,var(--s2),var(--s1))}
.tile small{display:block;color:var(--mut);font-weight:700;font-size:12px;letter-spacing:.08em}.tile b{display:block;font:800 clamp(30px,8vw,40px)/1.1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:-.03em}.tile i{font-style:normal;color:var(--mut);font-size:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.chip{background:var(--s2);border:1px solid var(--bd);border-radius:999px;padding:6px 12px;font-size:13px;color:var(--mut)}.chip b{color:var(--tx);margin-left:4px}
.kv{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px solid var(--bd);font-size:14px}.kv:last-child{border:0}.kv span{color:var(--mut)}.kv b{text-align:right}
.good{color:var(--good)}.bad{color:var(--bad)}
.alert{border-radius:12px;padding:10px 12px;font-size:13px;margin-top:10px;background:color-mix(in srgb,var(--warn) 15%,transparent);color:var(--warn);font-weight:500}.alert.bad{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad)}
.rwy,.chart{width:100%;height:auto;display:block}.rwy text,.chart text{font-family:system-ui,sans-serif}
.rid{fill:#fff;font:800 22px system-ui}.tk{fill:var(--mut);font:600 15px system-ui}.mk{fill:var(--tx);font:700 19px system-ui;paint-order:stroke;stroke:var(--s1);stroke-width:5px;stroke-linejoin:round}
.btn{font:600 15px system-ui;padding:11px 18px;border-radius:12px;border:1px solid var(--bd);background:var(--s1);color:var(--tx);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px}.btn:hover{border-color:var(--ac)}
.btn.primary{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;border:0;box-shadow:0 8px 20px color-mix(in srgb,var(--ac) 35%,transparent)}
.btnrow{display:flex;flex-wrap:wrap;gap:10px}
.seg{display:flex;background:var(--s2);border:1px solid var(--bd);border-radius:12px;padding:3px;gap:3px}.seg button{flex:1;font:600 13px system-ui;padding:8px 6px;border:0;border-radius:9px;background:transparent;color:var(--mut);cursor:pointer;white-space:nowrap}.seg button.on{background:var(--s1);color:var(--ac);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.mini{display:none}
@media(max-width:959px){.mini{display:flex;justify-content:space-around;position:fixed;left:12px;right:12px;bottom:calc(env(safe-area-inset-bottom,0px) + 12px);z-index:55;background:color-mix(in srgb,var(--s1) 94%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--bd);border-radius:16px;padding:8px 6px;box-shadow:var(--sh)}}
@media(max-width:760px){.mini{bottom:calc(env(safe-area-inset-bottom,0px) + 72px)}}
.mini span{font-size:12px;color:var(--mut);text-align:center}.mini b{display:block;font:800 22px ui-monospace,Menlo,monospace;color:var(--tx)}
.foot{max-width:1100px;margin:0 auto;padding:10px 16px 40px;color:var(--mut);font-size:13px;display:grid;gap:4px}
table.t{width:100%;border-collapse:collapse;font-size:14px}.t th,.t td{padding:8px 6px;border-bottom:1px solid var(--bd);text-align:right}.t th:first-child,.t td:first-child{text-align:left}.t th{color:var(--mut);font-weight:600;font-size:12px}
.explain{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.explain div{background:var(--s2);border-radius:14px;padding:12px 14px;font-size:14px}.explain b{display:block;margin-bottom:2px}
/* runway page */
.vizpanel{position:sticky;top:calc(var(--hh) + env(safe-area-inset-top,0px));z-index:30;background:var(--s1);border:1px solid var(--bd);border-radius:20px;padding:12px;margin-bottom:14px;box-shadow:var(--sh)}
.readout{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:6px 0 8px}.readout div{background:var(--s2);border-radius:10px;padding:5px 4px;text-align:center}.readout small{display:block;font-size:10px;font-weight:700;letter-spacing:.08em;color:var(--mut);text-transform:uppercase}.readout b{font:800 16px ui-monospace,Menlo,monospace;white-space:nowrap}
.ctl{display:flex;gap:8px;align-items:center}.ctl input[type=range]{flex:1;accent-color:var(--ac);min-width:0}.ctl button,.ctl select{font:600 14px system-ui;border:1px solid var(--bd);background:var(--s2);color:var(--tx);border-radius:10px;padding:8px 12px}
.ctl .go{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;border:0;min-width:46px}
.vizpanel .seg{margin-bottom:6px}.vizpanel .rwy{max-width:820px;margin:0 auto}
@media(max-width:560px){.vizpanel{padding:8px;border-radius:16px}.readout{gap:4px}.readout b{font-size:12.5px}.readout div{padding:5px 2px}}
.evt{display:flex;gap:10px;align-items:center;padding:8px 0;border-bottom:1px solid var(--bd);font-size:14px}.evt:last-child{border:0}.evt i{width:12px;height:12px;border-radius:50%;flex:none}.evt span{margin-left:auto;color:var(--mut);text-align:right}
/* briefing */
.sheet{font:14px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;white-space:pre-wrap;background:var(--s2);border:1px dashed var(--bd);border-radius:14px;padding:16px;margin:0}
/* landing page */
.hero{position:relative;overflow:hidden;color:#fff;background:#070d1b;padding:calc(54px + env(safe-area-inset-top,0px)) 0 64px;margin-top:calc(-1 * var(--hh) - env(safe-area-inset-top,0px));padding-top:calc(var(--hh) + 40px + env(safe-area-inset-top,0px))}
.hero:before{content:"";position:absolute;inset:-20% -10% auto -10%;height:120%;background:radial-gradient(600px 360px at 15% 20%,rgba(51,102,240,.55),transparent 70%),radial-gradient(520px 340px at 85% 10%,rgba(122,77,255,.5),transparent 70%),radial-gradient(500px 300px at 60% 90%,rgba(0,190,200,.25),transparent 70%)}
.hero .in{position:relative;max-width:1100px;margin:0 auto;padding:0 16px;display:grid;gap:28px;align-items:center}
@media(min-width:900px){.hero .in{grid-template-columns:1.1fr .9fr}}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#a9c4ff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:5px 12px;border-radius:999px}
.hero h1{font-size:clamp(34px,7.5vw,60px);letter-spacing:-.035em;margin:14px 0 12px}.hero h1 span{background:linear-gradient(90deg,#8cb4ff,#c3a8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:#c3d0e8;font-size:18px;max-width:560px;margin:0 0 22px}
.hero .btn{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff}.hero .btn.primary{background:#fff;color:#0b1220;border:0;box-shadow:none}
.mock{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:16px;backdrop-filter:blur(8px)}
.mock .tile{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.14);color:#fff}.mock .tile small,.mock .tile i{color:#a9bbd8}
.mock .cap{font-size:12px;color:#a9bbd8;margin:10px 2px 0;display:flex;justify-content:space-between}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:-30px 0 8px;position:relative}
.stat{background:var(--s1);border:1px solid var(--bd);border-radius:18px;padding:14px;text-align:center;box-shadow:var(--sh)}.stat b{display:block;font-size:26px;letter-spacing:-.02em}.stat span{color:var(--mut);font-size:13px}
.sec{margin-top:40px}.sec>h2{font-size:clamp(22px,4vw,30px);letter-spacing:-.02em;margin:0 0 6px}.sec>p.lead{color:var(--mut);margin:0 0 18px;max-width:640px}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
a.feat{display:flex;gap:14px;background:var(--s1);border:1px solid var(--bd);border-radius:20px;padding:18px;text-decoration:none;color:inherit;box-shadow:var(--sh);transition:transform .15s,border-color .15s}a.feat:hover{transform:translateY(-3px);border-color:var(--ac)}
.feat .ic{font-size:30px;line-height:1;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,color-mix(in srgb,var(--ac) 18%,transparent),color-mix(in srgb,var(--ac2) 18%,transparent));display:grid;place-items:center;flex:none}
.feat b{display:block;font-size:17px;margin-bottom:2px}.feat span{color:var(--mut);font-size:14px}.feat em{display:block;margin-top:6px;color:var(--ac);font-style:normal;font-weight:600;font-size:13px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;counter-reset:s}.steps div{background:var(--s1);border:1px solid var(--bd);border-radius:20px;padding:18px}.steps div:before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;font-weight:700;margin-bottom:10px}
.faq details{background:var(--s1);border:1px solid var(--bd);border-radius:14px;padding:14px 16px;margin-bottom:10px}.faq summary{cursor:pointer;font-weight:600}.faq p{color:var(--mut);margin:8px 0 0}
/* info tips and weather */
.tip{display:inline-grid;place-items:center;width:17px;height:17px;border-radius:50%;background:var(--s2);border:1px solid var(--bd);font:700 11px/1 system-ui;font-style:normal;color:var(--mut);cursor:help;margin-left:6px;vertical-align:middle;text-transform:none;letter-spacing:0;user-select:none;-webkit-user-select:none}
.tip:hover,.tip:focus{background:var(--ac);color:#fff;border-color:var(--ac);outline:none}
h1 .tip{width:20px;height:20px;font-size:12px;margin-left:10px;vertical-align:middle}
#tipbox{display:none;position:fixed;z-index:200;max-width:min(300px,calc(100vw - 16px));background:#101828;color:#fff;font:500 13px/1.45 system-ui;padding:9px 12px;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.35);pointer-events:none;text-transform:none;letter-spacing:0}
.wxrow{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.wxrow .note{margin:0;flex:1 1 200px}.btn:disabled{opacity:.6;cursor:wait}
/* weather card, runway helper, toast */
.wxcard{background:var(--s2);border:1px solid var(--bd);border-radius:14px;padding:12px;margin-top:4px}
.wxhead{display:flex;align-items:center;gap:8px;margin-bottom:8px}.wxhead b{font-size:15px}.wxhead small{margin-left:auto;color:var(--mut)}
.cat{color:#fff;font:700 11px system-ui;padding:3px 8px;border-radius:999px;letter-spacing:.04em}
.wxgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px;font-size:14px}.wxgrid small{display:block;color:var(--mut);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.raw{margin:10px 0 0;font:12px/1.5 ui-monospace,Menlo,monospace;white-space:pre-wrap;word-break:break-word;color:var(--mut)}
.tafl{padding:8px 0;border-top:1px solid var(--bd)}.tafl code{font:12px/1.5 ui-monospace,Menlo,monospace;word-break:break-word}.tafd{font-size:13px;color:var(--mut);margin-top:2px}
.rwh{margin-top:4px}.rwh-t{font-size:12px;font-weight:700;color:var(--mut);margin-bottom:4px}.rwh tr.cur td{background:color-mix(in srgb,var(--ac) 10%,transparent)}
.best{background:var(--good);color:#fff;font:700 10px system-ui;padding:2px 6px;border-radius:999px;vertical-align:middle}
.mini-b{font:600 12px system-ui;padding:5px 10px;border-radius:8px;border:1px solid var(--bd);background:var(--s1);color:var(--ac);cursor:pointer}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + 84px);z-index:300;background:#101828;color:#fff;border-radius:14px;padding:10px 14px;display:flex;gap:12px;align-items:center;box-shadow:0 10px 30px rgba(0,0,0,.4);font-size:14px;max-width:calc(100vw - 24px)}.toast button{font:700 13px system-ui;background:transparent;border:0;color:#8cb4ff;cursor:pointer}
.scroll{max-height:340px;overflow:auto;border:1px solid var(--bd);border-radius:12px}.scroll .t{margin:0}.scroll th{position:sticky;top:0;background:var(--s1)}
/* print */
@media print{.hdr,.tabs,.foot,.noprint,.mini,button{display:none!important}body{background:#fff;color:#000}.card{box-shadow:none;border-color:#bbb}.sheet{background:#fff}}

/* overlays: search, more menu, install help */
.ov{position:fixed;inset:0;z-index:250;background:rgba(5,10,20,.55);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:none;align-items:flex-end;justify-content:center}.ov.on{display:flex}
@media(min-width:761px){.ov{align-items:flex-start;padding-top:12vh}}
.sheet2{background:var(--s1);border:1px solid var(--bd);border-radius:22px 22px 0 0;width:100%;max-width:560px;max-height:82vh;overflow:auto;padding:16px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0px));box-shadow:0 -20px 60px rgba(0,0,0,.4)}
@media(min-width:761px){.sheet2{border-radius:22px;max-height:70vh}}
.sheet2 h3{margin:2px 0 10px;font-size:18px}.sheet2 .x{float:right;font:600 13px system-ui;border:1px solid var(--bd);background:var(--s2);color:var(--tx);border-radius:999px;padding:6px 12px;cursor:pointer}
.menu a,.menu button{display:flex;gap:12px;align-items:center;padding:11px 8px;border-radius:12px;text-decoration:none;color:var(--tx);font:600 15px system-ui;background:none;border:0;width:100%;text-align:left;cursor:pointer}
.menu a:hover,.menu button:hover,.menu .sel{background:var(--s2)}.menu i{font-style:normal;font-size:22px;width:30px;text-align:center}.menu small{display:block;color:var(--mut);font-weight:500;font-size:12px}
.srch input{width:100%;font:500 17px system-ui;padding:13px 14px;border-radius:14px;border:1px solid var(--bd);background:var(--s2);color:var(--tx);margin-bottom:8px}.srch input:focus{outline:2px solid var(--ac)}
.steps2{list-style:none;margin:0 0 6px;padding:0;counter-reset:s2}.steps2 li{counter-increment:s2;display:flex;gap:10px;padding:8px 0;font-size:15px}.steps2 li:before{content:counter(s2);flex:none;width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px}
.flow{display:flex;gap:10px;margin:6px 0 0}.flow a{flex:1;display:flex;flex-direction:column;padding:14px 16px;border-radius:16px;border:1px solid var(--bd);background:var(--s1);text-decoration:none;color:var(--tx);box-shadow:var(--sh)}.flow a small{color:var(--mut);font-weight:600;font-size:12px}.flow a b{font-size:16px}.flow a.n{text-align:right;border-color:color-mix(in srgb,var(--ac) 45%,var(--bd))}.flow a:hover{border-color:var(--ac)}
.hide-m{display:inline}@media(max-width:760px){.hide-m{display:none}}
.pill.go{display:inline-flex;gap:6px;align-items:center}

@media(max-width:760px){.tabs>*{font-size:10px;padding:7px 0 6px}.tabs>* span{font-size:19px}}