/* 4islandkrabi.tours — "Andaman logbook" theme */
:root{
  --paper:#f5efe3;
  --paper-2:#ede3cf;
  --card:#fffbf3;
  --ink:#13242c;
  --ink-2:#33464e;
  --muted:#5f7178;
  --sea:#0d6b70;
  --sea-deep:#082f38;
  --sea-soft:#dcece8;
  --coral:#c94f33;
  --coral-soft:#f8e1d7;
  --sun:#f2a65a;
  --line:#d9cbb0;
  --radius:14px;
  --maxw:1180px;
  --gutter:16px;
  --serif:"Fraunces", Georgia, "Times New Roman", serif;
  --sans:"Figtree", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.7 var(--sans);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--sea);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--coral)}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:8px 14px;z-index:99}
.skip:focus{left:8px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}

/* strip + header */
.strip{background:var(--sea-deep);color:#cfe3df;font-size:13px;letter-spacing:.02em}
.strip .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:6px;padding-bottom:6px}
.strip span:last-child{opacity:.8}
.masthead{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.masthead .wrap{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex-shrink:0}
.brand svg{width:36px;height:36px}
.brand b{font:600 20px/1 var(--serif);letter-spacing:-.01em}
.brand em{font-style:normal;color:var(--coral)}
.nav{margin-left:auto;min-width:0}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.nav a{display:block;padding:8px 11px;border-radius:999px;color:var(--ink-2);text-decoration:none;font-size:15px;font-weight:500;white-space:nowrap}
.nav a:hover{background:var(--paper-2);color:var(--ink)}
.nav a[aria-current="true"]{background:var(--sea);color:#fff}

/* breadcrumbs + page head */
.crumbs{font-size:14px;color:var(--muted);margin:22px 0 10px}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--coral)}
.pagehead{padding-bottom:10px}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--coral);margin-bottom:6px}
h1,h2,h3{font-family:var(--serif);color:var(--ink);line-height:1.2;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.6vw,50px);font-weight:600;margin:0 0 14px;max-width:22ch}
h2{font-size:clamp(24px,3vw,32px);font-weight:600;margin:48px 0 14px;scroll-margin-top:90px}
h3{font-size:clamp(19px,2.2vw,22px);font-weight:600;margin:30px 0 8px;scroll-margin-top:90px}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14px;color:var(--muted)}
.meta span::before{content:"◦ ";color:var(--sea)}
.hero-fig{margin:22px 0 0}
.hero-fig img{width:100%;aspect-ratio:21/9;object-fit:cover;border-radius:var(--radius)}

/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:48px;align-items:start;margin-top:26px}
.article{min-width:0;max-width:760px}
.article p,.article li{color:var(--ink-2)}
.article strong{color:var(--ink)}
.article ul,.article ol{padding-left:22px}
.article li{margin:4px 0}
.article li::marker{color:var(--sea)}
.lead{font-size:19px;color:var(--ink)!important}

/* TL;DR ticket */
.ticket{display:grid;grid-template-columns:62px 1fr;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:6px 0 26px;box-shadow:0 1px 0 rgba(19,36,44,.04),0 10px 30px -18px rgba(19,36,44,.35)}
.ticket .stub{background:var(--coral);color:#fff;display:flex;align-items:center;justify-content:center;position:relative;border-right:2px dashed var(--card)}
.ticket .stub span{writing-mode:vertical-rl;transform:rotate(180deg);font:700 15px/1 var(--sans);letter-spacing:.2em}
.ticket .body{padding:16px 20px}
.ticket .body p{margin:0;color:var(--ink)}
.ticket .body ul{margin:8px 0 0;padding-left:20px}
.ticket .body li{margin:2px 0;color:var(--ink-2)}

/* TOC */
.toc{position:sticky;top:92px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;font-size:14.5px}
.toc summary{font:600 16px/1.3 var(--serif);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:"+";color:var(--sea);font:600 20px/1 var(--sans)}
.toc[open] summary::after{content:"–"}
.toc ol{counter-reset:t;list-style:none;margin:12px 0 0;padding:0}
.toc li{counter-increment:t;margin:0;border-top:1px dashed var(--line)}
.toc a{display:grid;grid-template-columns:28px 1fr;padding:7px 0;color:var(--ink-2);text-decoration:none;line-height:1.35}
.toc a::before{content:counter(t,decimal-leading-zero);color:var(--coral);font-weight:700;font-size:12.5px;padding-top:1px}
.toc a:hover,.toc a.on{color:var(--sea)}
.toc-mobile{display:none;margin:0 0 20px}

/* figures, tables, notes */
figure{margin:26px 0}
figure img{border-radius:12px;width:100%;background:var(--paper-2)}
figcaption{font-size:14px;color:var(--muted);margin-top:8px;font-style:italic}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:26px 0}
.pair figure{margin:0}
.pair img{aspect-ratio:4/3;object-fit:cover}
.table-wrap{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:12px;background:var(--card);-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
th,td{padding:10px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{background:var(--paper-2);font-weight:700;color:var(--ink);font-size:14px;letter-spacing:.02em}
tbody tr:nth-child(even){background:#fbf5ea}
tbody tr:last-child td{border-bottom:0}
td:first-child{font-weight:600;color:var(--ink)}
.note{background:var(--sea-soft);border-left:4px solid var(--sea);border-radius:0 12px 12px 0;padding:14px 18px;margin:22px 0}
.note.warm{background:var(--coral-soft);border-left-color:var(--coral)}
.note b.tag{display:block;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--sea);margin-bottom:2px}
.note.warm b.tag{color:var(--coral)}
.note p{margin:0;color:var(--ink)}

/* route strip */
.route{list-style:none;margin:26px 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.route::before{content:"";position:absolute;left:12%;right:12%;top:22px;border-top:2px dashed var(--sea)}
.route li{text-align:center;position:relative;padding:0 6px}
.route .n{display:grid;place-items:center;width:44px;height:44px;margin:0 auto 8px;border-radius:50%;background:var(--sea);color:#fff;font:700 17px/1 var(--serif);border:4px solid var(--paper)}
.route b{display:block;font:600 16px/1.25 var(--serif);color:var(--ink)}
.route small{display:block;color:var(--muted);font-size:13.5px;line-height:1.4;margin-top:2px}
.route a{text-decoration:none;color:inherit}

/* FAQ */
.faq .qa{border-top:1px solid var(--line);padding:4px 0 6px}
.faq .qa h3{margin-top:18px}
.faq .qa:last-child{border-bottom:1px solid var(--line)}

/* related */
.related{margin:54px 0 10px}
.related h2{margin-top:0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--ink);transition:transform .15s ease,border-color .15s ease}
.card:hover{transform:translateY(-2px);border-color:var(--sea);color:var(--ink)}
.card small{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--coral);font-weight:700}
.card b{display:block;font:600 17px/1.3 var(--serif);margin:4px 0}
.card span{display:block;font-size:14px;color:var(--muted);line-height:1.5}

/* home */
.home-hero{position:relative;color:#fff;background:var(--sea-deep)}
.home-hero img{width:100%;height:min(78vh,640px);object-fit:cover;opacity:.9}
.home-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,47,56,.05) 30%,rgba(8,47,56,.85) 100%)}
.home-hero .over{position:absolute;left:0;right:0;bottom:0;z-index:2;padding-bottom:36px}
.home-hero h1{color:#fff;max-width:18ch;text-shadow:0 2px 20px rgba(0,0,0,.35)}
.home-hero .eyebrow{color:var(--sun)}
.home-hero p{max-width:60ch;margin:0;color:#e9f1ef;font-size:18px}
.home-hero .crumbs{display:none}
.clusters{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:24px 0}
.cluster{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 12px;scroll-margin-top:96px}
.cluster:target{border-color:var(--coral);box-shadow:0 0 0 3px var(--coral-soft)}
.cluster h3{margin:0 0 8px;font-size:19px}
.cluster ul{list-style:none;padding:0;margin:0}
.cluster li{border-top:1px dashed var(--line);margin:0}
.cluster li a{display:block;padding:8px 0;text-decoration:none;font-weight:500}

/* forms */
.form{display:grid;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:22px 0}
.form label{display:grid;gap:6px;font-weight:600;font-size:15px}
.form input,.form textarea,.form select{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
.form textarea{min-height:140px;resize:vertical}
.btn{display:inline-block;background:var(--sea);color:#fff;border:0;border-radius:999px;padding:12px 22px;font:600 16px/1 var(--sans);cursor:pointer;text-decoration:none;justify-self:start}
.btn:hover{background:var(--coral);color:#fff}

/* footer */
.foot{background:var(--sea-deep);color:#c8dcd8;margin-top:80px;position:relative;font-size:15px}
.foot::before{content:"";position:absolute;left:0;right:0;top:-18px;height:20px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 20' preserveAspectRatio='none'%3E%3Cpath d='M0 20V10c15-8 25-8 40 0s25 8 40 0 25-8 40 0v10z' fill='%23082f38'/%3E%3C/svg%3E") repeat-x;background-size:120px 20px}
.foot .wrap{padding-top:44px;padding-bottom:26px}
.foot-grid{display:grid;grid-template-columns:1.3fr repeat(4,1fr);gap:28px}
.foot h4{font:600 16px/1.3 var(--serif);color:#fff;margin:0 0 10px}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin:6px 0}
.foot a{color:#c8dcd8;text-decoration:none}
.foot a:hover{color:var(--sun)}
.foot p{margin:0 0 10px;line-height:1.6}
.foot-base{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:16px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13.5px;color:#9fbab5}

/* back to top */
#toTop{position:fixed;right:18px;bottom:18px;width:48px;height:48px;border-radius:50%;border:0;background:var(--coral);color:#fff;cursor:pointer;box-shadow:0 8px 20px -6px rgba(19,36,44,.5);opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .2s ease,transform .2s ease;z-index:50}
#toTop.show{opacity:1;transform:none;pointer-events:auto}
#toTop:hover{background:var(--sea)}
#toTop svg{width:22px;height:22px;margin:auto}

/* sitemap page */
.sm-list{columns:2;column-gap:40px}
.sm-list section{break-inside:avoid;margin-bottom:22px}
.sm-list h2{margin-top:0;font-size:22px}

@media (max-width:1020px){
  .layout{grid-template-columns:1fr}
  .aside{display:none}
  .toc-mobile{display:block}
  .toc-mobile .toc{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .masthead .wrap{flex-wrap:wrap;gap:4px;padding-top:10px}
  .nav{margin-left:0;width:100%;position:relative}
  .nav ul{overflow-x:auto;scrollbar-width:none;padding-bottom:10px;-webkit-overflow-scrolling:touch}
  .nav ul::-webkit-scrollbar{display:none}
  .nav::after{content:"";position:absolute;right:0;top:0;bottom:10px;width:28px;background:linear-gradient(90deg,rgba(245,239,227,0),var(--paper));pointer-events:none}
  .nav a{background:var(--paper-2);font-size:14px;padding:7px 12px}
  .masthead{position:static}
  h2,h3,.cluster{scroll-margin-top:16px}
  .toc{top:16px}
}
@media (max-width:640px){
  body{font-size:16.5px}
  .strip span:last-child{display:none}
  .hero-fig img{aspect-ratio:16/10}
  .home-hero img{height:560px}
  .route{grid-template-columns:1fr 1fr;row-gap:22px}
  .route::before{display:none}
  .pair{grid-template-columns:1fr}
  .ticket{grid-template-columns:44px 1fr}
  .ticket .body{padding:14px 16px}
  .foot-grid{grid-template-columns:1fr}
  .sm-list{columns:1}
  #toTop{right:12px;bottom:12px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.article h4{font:600 19px/1.3 var(--serif);color:var(--ink);margin:28px 0 6px;scroll-margin-top:90px}
.article h4::before{content:"◆ ";color:var(--coral);font-size:13px;vertical-align:2px}
.article code{background:var(--paper-2);padding:1px 6px;border-radius:5px;font-size:.9em}
.nw{white-space:nowrap}