@charset "UTF-8";
/* 1.6 design pass: shared tokens, header, focus, and the new home page. Loaded last. */
:root{
  --bg:#f0f4f2;--ink:#14302c;--muted:#64786f;--line:#dbe5e0;--green:#1b6659;--mint:#e3efe9;
  --navy:#0d2a33;--chart:#e4edea;--track:#0f4c5c;--buoy:#d8962b;--buoy-ink:#8d5b0d;
  --shadow:0 1px 2px #0d2a3310,0 6px 20px #0d2a3308;
  font-family:Pretendard,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",Inter,"Segoe UI",sans-serif;
}
body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
:focus-visible{outline:3px solid #2a8f7e;outline-offset:2px;border-radius:6px}
.panel{border-radius:14px;box-shadow:var(--shadow)}
.page-heading h1,.lesson-intro h1{letter-spacing:-.02em;font-weight:800}

/* header */
.header{position:sticky;top:0;z-index:40;background:#ffffffe8;backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
@media(min-width:961px){.header{height:76px}}
.brand{letter-spacing:.4px;color:var(--navy)}
.brand b{font-weight:800;color:var(--green)}
.brand small{letter-spacing:0;font-size:11px;color:var(--muted)}
.brand-mark{background:none;width:49px;height:49px}
.nav-button{border-bottom:0;border-radius:999px;padding:8px 14px;color:#5d726a;transition:background-color .15s,color .15s}
.nav-button:hover{background:var(--mint);color:var(--green)}
.nav-button.active{background:var(--navy);color:#fff}
.nav-button.active .count{background:#ffffff26;color:#fff}
@media(max-width:680px){.nav-button{padding:6px 8px}}

/* buttons */
.primary{background:var(--navy);border-color:var(--navy);border-radius:10px;transition:background-color .15s}
.primary:hover{background:#17495a}

/* home */
.hm{padding-top:46px;padding-bottom:56px}
.hm h1{margin:0;font-size:clamp(34px,4.6vw,58px);line-height:1.12;letter-spacing:-.035em;font-weight:800;color:var(--navy)}
.hm-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:56px;align-items:center}
.hm-lede{margin:22px 0 0;max-width:34em;font-size:16.5px;line-height:1.8;color:#3f5a53}
.hm-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:30px}
.hm-start{min-height:52px;padding:0 28px;font-size:15px;font-weight:700;border-radius:12px}
.hm-link{border:0;background:none;padding:10px 2px;font-size:15px;font-weight:600;color:var(--green);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:5px}
.hm-link:hover{color:var(--navy)}
.hm-facts{display:flex;gap:0;margin:40px 0 0;padding:0;border-top:1px solid var(--line)}
.hm-facts div{flex:1;padding:16px 0 0}
.hm-facts div+div{padding-left:22px;border-left:1px solid var(--line)}
.hm-facts dt{font-size:12.5px;color:var(--muted)}
.hm-facts dd{margin:2px 0 0;font-size:24px;font-weight:800;letter-spacing:-.02em;color:var(--navy)}

.hm-chart{margin:0;border-radius:18px;overflow:hidden;background:var(--chart);box-shadow:0 0 0 1px #b9cdc7,0 18px 40px -18px #0d2a3355}
.hm-chart svg{display:block;width:100%;height:auto}
.hm-chart figcaption{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:12px 16px;background:#f6faf8;border-top:1px solid #c9d9d4;font-size:12.5px;color:#4d665f}
.hm-replay{flex:none;border:1px solid #b9cdc7;background:#fff;border-radius:999px;padding:5px 13px;font-size:12.5px;font-weight:600;color:var(--green)}
.hm-replay:hover{background:var(--mint)}
.hm-ship{offset-path:path("M150 460V300A110 110 0 0 1 260 190H520");offset-rotate:auto;offset-distance:100%}
.hm-track{stroke-dasharray:1;stroke-dashoffset:0}
.hm-play .hm-track{animation:hm-draw 7s cubic-bezier(.45,.05,.4,1) both}
.hm-play .hm-ship{animation:hm-sail 7s cubic-bezier(.45,.05,.4,1) both}
@keyframes hm-draw{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
@keyframes hm-sail{from{offset-distance:0%}to{offset-distance:100%}}

.hm-doors{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:18px;margin-top:64px}
.hm-door{display:flex;flex-direction:column;align-items:flex-start;gap:6px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:16px;padding:22px 24px;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.hm-door:hover{border-color:#8db3aa;box-shadow:var(--shadow)}
.hm-door-title{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--navy)}
.hm-door-text{font-size:14px;line-height:1.7;color:#4f665f;max-width:36em}
.hm-door-list{display:grid;grid-template-rows:repeat(3,1fr);gap:12px}
.hm-door-main{position:relative;justify-content:flex-end;min-height:360px;padding:28px;background:var(--navy);border-color:var(--navy);overflow:hidden}
.hm-door-main:hover{border-color:#2a6d7e;box-shadow:none}
.hm-door-main .hm-door-title{font-size:26px;color:#fff}
.hm-door-main .hm-door-text{color:#bcd3cf;font-size:15px}
.hm-door-art{position:absolute;top:0;left:0;right:0;width:100%;height:58%;object-fit:cover}
.hm-door-go{margin-top:12px;padding:8px 16px;border-radius:999px;background:var(--buoy);color:#2d1f05;font-size:13.5px;font-weight:800}

.hm-new{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:48px;margin-top:64px;padding:36px 0 0;border-top:1px solid var(--line)}
.hm-new h2{margin:0;font-size:26px;line-height:1.3;letter-spacing:-.03em;font-weight:800;color:var(--navy)}
.hm-new p{margin:12px 0 20px;max-width:32em;line-height:1.8;color:#46605a}
.hm-scenes{display:grid;gap:0;margin:0;padding:0;list-style:none;counter-reset:s}
.hm-scenes li{display:grid;grid-template-columns:36px 9em 1fr;align-items:baseline;gap:6px;padding:13px 0;border-bottom:1px solid var(--line);counter-increment:s}
.hm-scenes li:first-child{border-top:1px solid var(--line)}
.hm-scenes li::before{content:counter(s);font-size:13px;font-weight:800;color:var(--buoy-ink)}
.hm-scenes b{font-size:15px;color:var(--navy)}
.hm-scenes span{font-size:13.5px;color:#58716a}

.hm-note{max-width:46em;margin:48px 0 0;font-size:12.5px;line-height:1.8;color:var(--muted)}

@media(max-width:960px){
  .hm{padding-top:28px}
  .hm-hero,.hm-doors,.hm-new{grid-template-columns:1fr;gap:28px}
  .hm-doors,.hm-new{margin-top:44px}
  .hm-door-main{min-height:300px}
  .hm-door-list{grid-template-rows:none}
}
@media(max-width:560px){
  .hm-lede{font-size:15px}
  .hm-facts dd{font-size:20px}
  .hm-facts div+div{padding-left:14px}
  .hm-scenes li{grid-template-columns:28px 1fr}
  .hm-scenes span{grid-column:2}
  .hm-chart figcaption{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){.hm-play .hm-track,.hm-play .hm-ship{animation:none}}

.hm-chart svg,.hm-chart svg text{stroke:none}
.hm-chart svg text{paint-order:normal}
.header nav{align-items:center}
.nav-button{min-height:40px}
.hm-door-art{height:62%}

.hm-door-art{position:static;flex:none;align-self:stretch;width:calc(100% + 56px);max-width:none;height:210px;margin:-28px -28px auto}
@media(max-width:680px){
  .header nav{order:3;width:100%;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding-bottom:8px}
  .header nav::-webkit-scrollbar{display:none}
  .nav-button{flex:none;white-space:nowrap;font-size:13px;padding:6px 12px}
  .nav-button svg{display:none}
}

/* page transitions: header stays put, content slides and fades in the direction of navigation */
.header{view-transition-name:site-header}
::view-transition-group(site-header){animation:none}
::view-transition-old(root){animation:vt-out .26s cubic-bezier(.4,0,1,1) both}
::view-transition-new(root){animation:vt-in .5s cubic-bezier(.16,.84,.24,1) both}
html[data-nav=back]::view-transition-old(root){animation-name:vt-out-back}
html[data-nav=back]::view-transition-new(root){animation-name:vt-in-back}
@keyframes vt-out{to{opacity:0;transform:translateX(-36px) scale(.992);filter:blur(5px)}}
@keyframes vt-in{from{opacity:0;transform:translateX(44px) scale(.992);filter:blur(7px)}}
@keyframes vt-out-back{to{opacity:0;transform:translateX(36px) scale(.992);filter:blur(5px)}}
@keyframes vt-in-back{from{opacity:0;transform:translateX(-44px) scale(.992);filter:blur(7px)}}
.no-vt .page:not([hidden]){animation:page-in .45s cubic-bezier(.16,.84,.24,1) both}
@keyframes page-in{from{opacity:0;transform:translateY(14px)}}
@media(prefers-reduced-motion:reduce){::view-transition-group(*),::view-transition-old(*),::view-transition-new(*){animation:none!important}.no-vt .page:not([hidden]){animation:none}}

/* 3D view overlays: glass chips instead of loose text on the sky */
.world-frame{border-radius:20px;overflow:hidden;box-shadow:0 0 0 1px #0d2a3322,0 24px 48px -24px #0d2a3388}
.world-frame::before{content:"";position:absolute;inset:auto 0 0 0;height:110px;background:linear-gradient(transparent,#04161e66);pointer-events:none}
.world-label,.view-tools,.compass,.heel-instrument,.map-card{background:#0a2430a6;-webkit-backdrop-filter:blur(10px) saturate(1.3);backdrop-filter:blur(10px) saturate(1.3);border:1px solid #ffffff24;border-radius:14px;box-shadow:0 8px 24px -10px #00000088}
.world-label{padding:8px 14px;color:#eaf5f2}
.world-label small{color:#a9cbc6}
.view-tools{padding:4px}
.view-tools button{color:#d3e6e2;border-radius:10px;font-size:11px;padding:5px 11px}
.view-tools button.active{background:#fff;color:#0d2a33;font-weight:700}
.compass{padding:8px 20px;border-bottom:1px solid #ffffff24;color:#b9d3ce;width:290px}
.compass strong{color:#fff}
.heel-instrument{padding:10px 6px 8px;width:159px}
.map-card{padding:10px 12px 8px}
.map-card>div{color:#cfe5e1}
.quality-wrap select{background:#0a2430a6;color:#e5f2ef;border:1px solid #ffffff24;border-radius:10px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.telemetry{border-radius:16px}
.mission-card{border-radius:16px;transition:border-color .15s,box-shadow .15s}
.mission-card:hover{border-color:#8db3aa;box-shadow:var(--shadow)}

/* bridge console: engine telegraph, helm orders, rudder indicator, wheel, order log */
.bridge-console{margin-top:14px;padding:12px;border-radius:16px;background:linear-gradient(180deg,#10343f,#0a2430);color:#dcebe8;box-shadow:inset 0 1px 0 #ffffff1a,0 10px 24px -14px #0a2430}
.bc-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:10px}
.bc-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 7px;font-size:11.5px;font-weight:700;color:#a9cbc6}
.bc-title .tip{background:#ffffff1c;color:#dcebe8;border-color:#ffffff30}
.bc-telegraph{display:flex;flex-direction:column;gap:4px}
.bc-eng{display:grid;grid-template-columns:1fr auto;grid-template-areas:"ko kn" "en kn";align-items:center;column-gap:6px;text-align:left;padding:5px 9px;border-radius:9px;border:1px solid #ffffff1f;background:#ffffff0f;color:#dcebe8;transition:background-color .12s,border-color .12s}
.bc-eng b{grid-area:ko;font-size:12px;font-weight:700;line-height:1.25}
.bc-eng small{grid-area:en;font-size:8.5px;letter-spacing:.06em;color:#8fb2ad}
.bc-eng em{grid-area:kn;font-style:normal;font-size:11px;font-variant-numeric:tabular-nums;color:#a9cbc6}
.bc-eng:hover:not(:disabled){background:#ffffff1c}
.bc-eng.active{background:#d8962b;border-color:#f0b955;color:#2b1d04}
.bc-eng.active small,.bc-eng.active em{color:#4b3410}
.bc-helm{display:flex;flex-direction:column;align-items:center}
.bc-helm .bc-title{align-self:stretch}
#bc-axio{width:100%;height:auto;display:block}
#bc-wheel{width:92px;height:92px;margin:4px 0 2px;cursor:grab;touch-action:none;border-radius:50%}
#bc-wheel:active{cursor:grabbing}
#bc-wheel.locked{opacity:.45;cursor:not-allowed}
#bc-wheel:focus-visible{outline:2px solid #f0b955;outline-offset:2px}
.bc-readout{display:flex;justify-content:space-between;gap:8px;align-self:stretch;font-size:11px;color:#8fb2ad}
.bc-readout b{color:#fff;font-variant-numeric:tabular-nums}
.bc-orders{display:grid;gap:5px;margin-top:11px}
.bc-port,.bc-stbd{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.bc-orders button{padding:6px 0;border-radius:8px;border:1px solid;font-size:11.5px;font-weight:700;line-height:1.15;transition:background-color .12s}
.bc-orders button small{display:block;font-size:8.5px;font-weight:600;opacity:.85}
.bc-port button{background:#c4503f26;border-color:#e07766aa;color:#ffd9d2}
.bc-port button:hover:not(:disabled){background:#c4503f55}
.bc-port button.active{background:#d9604d;border-color:#ff9d8f;color:#fff}
.bc-stbd button{background:#2f9a6a26;border-color:#62c796aa;color:#d6f6e6}
.bc-stbd button:hover:not(:disabled){background:#2f9a6a55}
.bc-stbd button.active{background:#2fa874;border-color:#8fe3bb;color:#fff}
.bc-mid{background:#ffffff14;border-color:#ffffff33;color:#eef6f4}
.bc-mid small{display:inline!important;margin-left:6px}
.bc-mid.active{background:#e9f3f1;border-color:#fff;color:#0d2a33}
.bc-orders button:disabled,.bc-eng:disabled{opacity:.4;cursor:not-allowed}
.bc-log{list-style:none;margin:11px 0 0;padding:9px 0 0;border-top:1px solid #ffffff1c;display:grid;gap:5px;font-size:11px;line-height:1.45;min-height:64px}
.bc-log li{display:grid;grid-template-columns:auto 1fr;column-gap:8px}
.bc-log time{color:#7fa39e;font-variant-numeric:tabular-nums}
.bc-log span{color:#eaf5f2;font-weight:600}
.bc-log i{grid-column:2;font-style:normal;color:#8fb2ad}
.bc-log li.ok i{color:#7fdcae}
.bc-log li.wait i{color:#f0b955}
.bc-log .empty{display:block;color:#7fa39e}
.bc-fine{margin-top:12px;border:1px solid var(--line);border-radius:12px;padding:0 12px}
.bc-fine summary{cursor:pointer;padding:10px 0;font-size:12px;font-weight:600;color:#4c6760}
.bc-fine[open] summary{border-bottom:1px solid var(--line);margin-bottom:2px}
@media(max-width:960px){.bc-grid{grid-template-columns:1fr 1fr}.bridge-console{max-width:520px}}
.bc-eng b{font-size:11.5px;letter-spacing:-.02em;white-space:nowrap}
.bc-eng small{font-size:8px;letter-spacing:0;white-space:nowrap}
.bc-readout span{display:flex;flex-direction:column;align-items:center;flex:1;line-height:1.35;white-space:nowrap}

.bc-telegraph{gap:3px}
.bc-eng{padding:4px 9px}
.bc-astern{border-color:#e0776655;background:#c4503f14}
.bc-astern:first-of-type{margin-top:0}
.bc-eng.bc-astern.active{background:#d9604d;border-color:#ff9d8f;color:#fff}
.bc-eng.bc-astern.active small,.bc-eng.bc-astern.active em{color:#ffe1db}
.bc-eng[data-eng="0"]{margin-bottom:5px}
.bc-note{margin:10px 0 0;padding:8px 10px;border-radius:10px;background:#d8962b1f;border:1px solid #d8962b66;font-size:11px;line-height:1.55;color:#f3d9a4}
.bc-eng{grid-template-columns:minmax(0,1fr) auto}
.bc-eng small{overflow:hidden;text-overflow:ellipsis}

/* time controls live on the 3D view, within reach of the helm */
.time-dock{position:absolute;left:50%;bottom:48px;transform:translateX(-50%);display:flex;align-items:center;gap:10px;padding:6px 8px 6px 6px;border-radius:999px;background:#0a2430b8;-webkit-backdrop-filter:blur(12px) saturate(1.3);backdrop-filter:blur(12px) saturate(1.3);border:1px solid #ffffff2a;box-shadow:0 10px 28px -12px #000a;color:#eaf5f2;z-index:2}
.time-dock .play-button{width:38px;height:38px;border-radius:50%;border:0;background:#fff;color:#0d2a33;font-size:15px;font-weight:800;display:grid;place-items:center}
.time-dock #sim-time{font-variant-numeric:tabular-nums;font-weight:700;font-size:14px;min-width:42px;color:#fff}
.time-dock .time-label{display:none}
.time-dock .time-buttons{display:flex;gap:2px;padding:3px;border-radius:999px;background:#ffffff14}
.time-dock .time-buttons button{min-width:40px;height:30px;border:0;border-radius:999px;background:none;color:#cfe5e1;font-size:13px;font-weight:700}
.time-dock .time-buttons button:hover{background:#ffffff1f}
.time-dock .time-buttons button.active{background:var(--buoy);color:#2b1d04}
@media(max-width:680px){.time-dock{bottom:44px;gap:6px}.time-dock #sim-time{min-width:36px;font-size:13px}}