/* TripKeyGo — light, airy airport-wayfinding look. Sky-white canvas, coral for "act now", sky blue for info, signage yellow for alerts. */
:root{
  --bg:#f6f9fd;
  --surface:#ffffff;
  --ink:#16233a;
  --muted:#5d6b82;
  --line:#e3e9f2;
  --sky:#2f7cf6;
  --sky-soft:#e8f1ff;
  --coral:#ff6a4d;
  --coral-soft:#fff0ec;
  --mint:#16a37f;
  --mint-soft:#e6f7f1;
  --sign:#ffc83d;
  --sign-soft:#fff7e0;
  --shadow:0 1px 2px rgba(22,35,58,.04),0 12px 32px -16px rgba(22,35,58,.18);
  --font-display:"Bricolage Grotesque","Noto Sans KR",system-ui,sans-serif;
  --font-body:"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1624;--surface:#172133;--ink:#eaf0f8;--muted:#a3b0c4;--line:#26334a;
    --sky:#6aa2ff;--sky-soft:#1a2a47;--coral:#ff8a70;--coral-soft:#3a2420;--mint:#3fd0a6;--mint-soft:#15342c;
    --sign:#ffd25e;--sign-soft:#3a3018;--shadow:0 12px 32px -16px rgba(0,0,0,.6);color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1624;--surface:#172133;--ink:#eaf0f8;--muted:#a3b0c4;--line:#26334a;
  --sky:#6aa2ff;--sky-soft:#1a2a47;--coral:#ff8a70;--coral-soft:#3a2420;--mint:#3fd0a6;--mint-soft:#15342c;
  --sign:#ffd25e;--sign-soft:#3a3018;--shadow:0 12px 32px -16px rgba(0,0,0,.6);color-scheme:dark;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.7;word-break:keep-all}
a{color:var(--sky)}
a:focus-visible,button:focus-visible{outline:3px solid var(--coral);outline-offset:2px;border-radius:6px}
h1,h2,h3{font-family:var(--font-display);line-height:1.25;text-wrap:balance;margin:0;letter-spacing:-.02em}
h1{font-size:clamp(2rem,4.6vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.55rem,3vw,2.15rem);font-weight:800}
h3{font-size:1.1rem;font-weight:700}
p{margin:0}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.mono{font-family:var(--font-mono)}
html[data-lang="ko"] .en{display:none}
html[data-lang="en"] .ko{display:none}

/* header */
header.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--font-display);font-weight:800;font-size:1.3rem;letter-spacing:-.02em}
.brand b{color:var(--coral);font-weight:800}
nav.links{display:flex;gap:24px;align-items:center}
nav.links a{color:var(--ink);text-decoration:none;font-size:.95rem;font-weight:500}
nav.links a:hover{color:var(--coral)}
.lang{display:flex;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px}
.lang button{border:0;background:transparent;color:var(--muted);font:700 .78rem var(--font-mono);padding:5px 11px;border-radius:999px;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--surface)}
@media (max-width:860px){nav.links .hide-sm{display:none}}

/* buttons, chips */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:12px;font-weight:700;text-decoration:none;font-size:.95rem}
.btn.primary{background:var(--coral);color:#fff;box-shadow:0 8px 20px -10px var(--coral)}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:700 .78rem var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--sky);background:var(--sky-soft);padding:6px 12px;border-radius:999px;margin-bottom:18px}
.eyebrow.coral{color:var(--coral);background:var(--coral-soft)}

section{padding:88px 0}
.sec-head{max-width:700px;margin-bottom:40px}
.sec-head p{color:var(--muted);margin-top:14px;font-size:1.05rem}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* hero */
.hero{padding:64px 0 72px;background:
  radial-gradient(900px 420px at 85% 10%, var(--sky-soft), transparent 70%),
  radial-gradient(700px 380px at 5% 90%, var(--coral-soft), transparent 70%);}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
@media (max-width:920px){.hero .wrap{grid-template-columns:1fr}}
.hero .kicker{font-size:1.15rem;font-weight:700;color:var(--muted);margin-bottom:10px}
.hero h1 em{font-style:normal;color:var(--coral)}
.hero p.lead{font-size:1.1rem;color:var(--muted);max-width:54ch;margin-top:22px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.status{margin-top:22px;font-size:.88rem;color:var(--muted);display:flex;align-items:center;gap:8px}
.status .dot{width:8px;height:8px;border-radius:50%;background:var(--mint)}

/* phone + notifications */
.phone{justify-self:center;width:min(360px,100%);background:var(--surface);border:1px solid var(--line);border-radius:36px;padding:14px;box-shadow:var(--shadow)}
.screen{background:linear-gradient(180deg,var(--sky-soft),var(--bg) 60%);border-radius:26px;padding:18px 14px 16px;display:grid;gap:10px}
.screen-top{display:flex;justify-content:space-between;align-items:center;font:700 .74rem var(--font-mono);color:var(--muted);padding:0 4px 4px}
.screen-title{font-weight:800;font-size:1.05rem;padding:0 4px 4px;font-family:var(--font-display)}
.note{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:11px 12px;display:grid;grid-template-columns:36px 1fr;gap:10px;align-items:start;box-shadow:0 4px 14px -10px rgba(22,35,58,.3)}
.note .ic{width:36px;height:36px;border-radius:11px;display:grid;place-items:center}
.note .ic.sky{background:var(--sky-soft);color:var(--sky)}
.note .ic.coral{background:var(--coral-soft);color:var(--coral)}
.note .ic.mint{background:var(--mint-soft);color:var(--mint)}
.note .ic.sign{background:var(--sign-soft);color:#b07800}
.note .h{display:flex;justify-content:space-between;gap:8px;font-size:.74rem;color:var(--muted)}
.note .h b{color:var(--ink);font-size:.8rem}
.note .m{font-size:.86rem;line-height:1.45;margin-top:2px}
.note .m strong{font-family:var(--font-mono)}
.sample{font-size:.72rem;color:var(--muted);text-align:center;padding-top:4px}

/* manifesto band */
.manifesto{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:56px 0}
.manifesto .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media (max-width:820px){.manifesto .wrap{grid-template-columns:1fr}}
.mf .n{font:800 2.2rem var(--font-display);color:var(--coral);line-height:1}
.mf h3{margin:10px 0 6px}
.mf p{color:var(--muted);font-size:.95rem}

/* arrival path */
.path{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
@media (max-width:920px){.path{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.path{grid-template-columns:1fr}}
.stop{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px 22px;box-shadow:var(--shadow);display:grid;gap:10px;align-content:start}
.stop .tag{display:inline-flex;width:max-content;align-items:center;gap:6px;font:700 .72rem var(--font-mono);letter-spacing:.06em;padding:5px 10px;border-radius:8px;background:var(--sign);color:#2a1d00}
.stop ul{margin:4px 0 0;padding-left:18px;color:var(--muted);font-size:.93rem;display:grid;gap:4px}

/* problems */
.problems{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:920px){.problems{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.problems{grid-template-columns:1fr}}
.prob{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;display:grid;gap:10px;align-content:start}
.prob .q{display:flex;align-items:center;gap:10px;font-weight:700}
.prob .q .ic{width:34px;height:34px;border-radius:10px;background:var(--coral-soft);color:var(--coral);display:grid;place-items:center;flex:none}
.prob p{color:var(--muted);font-size:.93rem}

/* timeline of alerts */
.alerts{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media (max-width:920px){.alerts{grid-template-columns:1fr}}
.tl{list-style:none;margin:0;padding:0;display:grid;gap:0;position:relative}
.tl li{display:grid;grid-template-columns:86px 18px 1fr;gap:14px;align-items:start;padding:12px 0;position:relative}
.tl li::before{content:"";position:absolute;left:94px;top:32px;bottom:-12px;width:2px;background:var(--line)}
.tl li:last-child::before{display:none}
.tl .when{font:700 .78rem var(--font-mono);color:var(--muted);text-align:right;padding-top:2px}
.tl .dot{width:18px;height:18px;border-radius:50%;background:var(--surface);border:3px solid var(--sky);margin-top:3px;z-index:1}
.tl li.hot .dot{border-color:var(--coral)}
.tl .what b{display:block}
.tl .what span{color:var(--muted);font-size:.92rem}

/* destination brief */
.brief{background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.brief-head{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:22px 26px;background:linear-gradient(90deg,var(--sky-soft),var(--coral-soft))}
.brief-head h3{font-size:1.35rem}
.brief-head .meta{font:600 .82rem var(--font-mono);color:var(--muted)}
.brief-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
@media (max-width:920px){.brief-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.brief-grid{grid-template-columns:1fr}}
.bi{padding:20px 24px;border-top:1px solid var(--line);border-right:1px solid var(--line);display:grid;gap:4px;align-content:start}
.bi .k{font:700 .72rem var(--font-mono);letter-spacing:.08em;color:var(--sky);text-transform:uppercase}
.bi b{font-size:1rem}
.bi span{color:var(--muted);font-size:.88rem}
.brief .foot{padding:12px 24px;font-size:.78rem;color:var(--muted);border-top:1px solid var(--line)}

/* departure strip */
.dep{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:920px){.dep{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.dep{grid-template-columns:1fr}}
.dep div{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;display:grid;gap:6px}
.dep .k{font:700 .72rem var(--font-mono);color:var(--muted)}
.dep p{color:var(--muted);font-size:.9rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:st}
@media (max-width:920px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.steps{grid-template-columns:1fr}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;display:grid;gap:8px;align-content:start;counter-increment:st}
.step::before{content:counter(st);width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font:800 .95rem var(--font-display);background:var(--sky-soft);color:var(--sky)}
.step.key{border-color:var(--coral)}
.step.key::before{background:var(--coral);color:#fff}
.step p{color:var(--muted);font-size:.93rem}

/* partners */
.cats{display:flex;flex-wrap:wrap;gap:10px}
.cat{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:10px 16px;font-weight:600;font-size:.93rem}
.cat i{font-style:normal;font:700 .72rem var(--font-mono);color:var(--sky)}
.moment{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:820px){.moment{grid-template-columns:1fr}}
.moment div{background:var(--surface);border:1px dashed var(--line);border-radius:16px;padding:18px 20px}
.moment .k{font:700 .74rem var(--font-mono);color:var(--coral)}
.moment p{color:var(--muted);font-size:.9rem;margin-top:4px}
.disclosure{margin-top:28px;background:var(--sign-soft);border-radius:16px;padding:20px 24px;display:grid;gap:6px;max-width:860px}
.disclosure p{color:var(--muted);font-size:.93rem}

/* contact */
.contact{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:36px;display:grid;grid-template-columns:1.2fr 1fr;gap:32px;box-shadow:var(--shadow)}
@media (max-width:820px){.contact{grid-template-columns:1fr;padding:26px}}
.contact p{color:var(--muted)}
dl.info{display:grid;grid-template-columns:max-content 1fr;gap:10px 20px;margin:0;align-content:start}
dl.info dt{font:600 .8rem var(--font-mono);color:var(--muted);padding-top:2px}
dl.info dd{margin:0;font-weight:500}

/* footer */
footer{border-top:1px solid var(--line);background:var(--surface);padding:36px 0 44px;font-size:.88rem;color:var(--muted)}
footer .wrap{display:grid;gap:14px}
footer .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
footer .fl{display:flex;gap:18px;flex-wrap:wrap}
footer .fl a{color:var(--ink);text-decoration:none}
footer .fl a.strong{font-weight:800}
footer .fl a:hover{color:var(--coral)}

/* legal pages */
.legal-page{padding:56px 0 88px}
.legal-wrap{max-width:820px;margin:0 auto;padding:0 20px}
.legal-wrap h1{font-size:clamp(1.8rem,3.6vw,2.4rem);margin-bottom:8px}
.legal-wrap .updated{font:500 .85rem var(--font-mono);color:var(--muted);margin-bottom:28px}
.legal-wrap .intro{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 22px;color:var(--muted);margin-bottom:28px}
.legal-wrap h2{font-size:1.2rem;margin:36px 0 12px;padding-top:4px}
.legal-wrap h3{font-size:1rem;margin:18px 0 8px}
.legal-wrap p,.legal-wrap li{color:var(--muted);font-size:.96rem}
.legal-wrap p+p{margin-top:8px}
.legal-wrap ol,.legal-wrap ul{padding-left:22px;display:grid;gap:6px;margin:8px 0}
.legal-wrap .toc{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin-bottom:12px}
.legal-wrap .toc ol{margin:6px 0 0}
.legal-wrap .toc a{text-decoration:none}
.tbl{overflow-x:auto;margin:10px 0;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.tbl table{border-collapse:collapse;width:100%;min-width:560px;font-size:.9rem}
.tbl th,.tbl td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;color:var(--muted)}
.tbl th{color:var(--ink);background:var(--bg);font-weight:700}
.tbl tr:last-child td{border-bottom:0}
.back{display:inline-flex;gap:6px;align-items:center;margin-bottom:24px;text-decoration:none;font-weight:600}

/* features */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:920px){.features{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.features{grid-template-columns:1fr}}
.feat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;display:grid;gap:10px;align-content:start}
.feat .ic{width:40px;height:40px;border-radius:12px;background:var(--sky-soft);color:var(--sky);display:grid;place-items:center}
.feat.core .ic{background:var(--coral-soft);color:var(--coral)}
.feat p{color:var(--muted);font-size:.93rem}
.feat .badge{justify-self:start;font:700 .68rem var(--font-mono);letter-spacing:.06em;color:var(--coral);background:var(--coral-soft);padding:3px 8px;border-radius:6px}
section.tint{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
section.tint .stop,section.tint .prob,section.tint .step,section.tint .feat,section.tint .dep div{background:var(--bg)}

/* guides */
.guide-page{padding:48px 0 88px}
.guide-wrap{max-width:860px;margin:0 auto;padding:0 20px}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:.88rem;color:var(--muted);margin-bottom:22px}
.crumbs a{text-decoration:none;font-weight:600}
.guide-hero{display:grid;gap:14px;margin-bottom:28px}
.guide-hero .code{font:800 clamp(2.6rem,7vw,4rem)/1 var(--font-display);color:var(--coral);letter-spacing:-.02em}
.guide-hero h1{font-size:clamp(1.8rem,4vw,2.5rem)}
.guide-hero .lede{color:var(--muted);font-size:1.08rem;max-width:62ch}
.guide-hero .updated{font:600 .82rem var(--font-mono);color:var(--muted)}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:0;background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:36px}
@media (max-width:620px){.facts{grid-template-columns:1fr}}
.facts .f{padding:18px 22px;border-bottom:1px solid var(--line);display:grid;gap:4px}
.facts .f:nth-child(odd){border-right:1px solid var(--line)}
@media (max-width:620px){.facts .f:nth-child(odd){border-right:0}}
.facts .k{font:700 .72rem var(--font-mono);letter-spacing:.08em;color:var(--sky);text-transform:uppercase}
.facts b{font-size:1rem}
.facts span.v{color:var(--muted);font-size:.92rem}
.gsec{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px 26px 24px;margin-bottom:16px;display:grid;gap:12px}
@media (max-width:540px){.gsec{padding:22px 18px}}
.gsec .tag{display:inline-flex;width:max-content;font:700 .72rem var(--font-mono);letter-spacing:.06em;padding:5px 10px;border-radius:8px;background:var(--sign);color:#2a1d00}
.gsec h2{font-size:1.3rem}
.gsec p,.gsec li{color:var(--muted);font-size:.97rem}
.gsec ul,.gsec ol{margin:0;padding-left:20px;display:grid;gap:6px}
.gsec strong{color:var(--ink)}
.gsec .tbl{margin:4px 0 0}
.gsec .tbl table{min-width:520px}
.tip{background:var(--sky-soft);border-radius:14px;padding:14px 16px;color:var(--ink);font-size:.93rem}
.tip.warn{background:var(--coral-soft)}
.app-cta{background:linear-gradient(120deg,var(--sky-soft),var(--coral-soft));border-radius:20px;padding:26px;margin:28px 0 16px;display:grid;gap:10px}
.app-cta p{color:var(--muted)}
.sources{margin-top:28px;padding:20px 22px;border:1px dashed var(--line);border-radius:16px;display:grid;gap:8px}
.sources h3{font-size:.95rem}
.sources ul{margin:0;padding-left:18px;display:grid;gap:4px;font-size:.86rem;color:var(--muted);word-break:break-all}
.sources p{font-size:.84rem;color:var(--muted)}
.glist{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media (max-width:700px){.glist{grid-template-columns:1fr}}
.gcard{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px;display:grid;gap:10px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);align-content:start}
.gcard:hover{border-color:var(--coral)}
.gcard .code{font:800 2rem/1 var(--font-display);color:var(--coral)}
.gcard p{color:var(--muted);font-size:.93rem}
.gcard .meta{font:600 .78rem var(--font-mono);color:var(--muted)}
.home-guides{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
@media (max-width:560px){
  .gsec .tbl{border:0;background:transparent;overflow:visible}
  .gsec .tbl table{min-width:0}
  .gsec .tbl thead{display:none}
  .gsec .tbl tr{display:grid;gap:4px;padding:14px 16px;margin-bottom:10px;background:var(--bg);border:1px solid var(--line);border-radius:14px}
  .gsec .tbl td{display:grid;grid-template-columns:72px 1fr;gap:10px;border:0;padding:0}
  .gsec .tbl td::before{content:attr(data-label);font:700 .72rem var(--font-mono);color:var(--sky);padding-top:3px}
  .gsec .tbl td:first-child{grid-template-columns:1fr;color:var(--ink);font-size:1rem;margin-bottom:2px}
  .gsec .tbl td:first-child::before{display:none}
}