/* TripSwap — Theme A (Clean Professional, Inter) with dark mode.
   Light is default; dark applies via prefers-color-scheme unless overridden,
   and via [data-theme="dark"] from the in-app toggle. */
:root{
  --navy:#0d1b3e; --navy2:#17306a;
  --ink:#0e1526; --muted:#6b7688; --line:#e9edf4; --bg:#f6f8fc; --card:#fff; --card2:#fff;
  --green:#12a150; --amber:#e8a33d; --accent:#3b6ef6; --wa:#25d366; --red:#e11d48;
  --heroText:#fff; --tagBg:#eaf3ec; --tagInk:#12a150; --chainBg:#eef3fe;
  --shadow:0 4px 16px -8px rgba(13,27,62,.12);
}
:root:not([data-theme="light"]) { }
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --navy:#101a30; --navy2:#0b1220;
  --ink:#eaf0fb; --muted:#8b97ad; --line:#233350; --bg:#0b1220; --card:#16233d; --card2:#121c31;
  --green:#2dd4bf; --amber:#f4b740; --accent:#5b8cff; --wa:#25d366;
  --heroText:#eaf0fb; --tagBg:rgba(45,212,191,.12); --tagInk:#2dd4bf; --chainBg:rgba(91,140,255,.12);
  --shadow:0 8px 24px -12px #000;
}}
:root[data-theme="dark"]{
  --navy:#101a30; --navy2:#0b1220;
  --ink:#eaf0fb; --muted:#8b97ad; --line:#233350; --bg:#0b1220; --card:#16233d; --card2:#121c31;
  --green:#2dd4bf; --amber:#f4b740; --accent:#5b8cff; --wa:#25d366;
  --heroText:#eaf0fb; --tagBg:rgba(45,212,191,.12); --tagInk:#2dd4bf; --chainBg:rgba(91,140,255,.12);
  --shadow:0 8px 24px -12px #000;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink);
  font-feature-settings:"tnum" 1,"cv05" 1;-webkit-font-smoothing:antialiased}
.app{max-width:460px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}
.hero{background:linear-gradient(160deg,var(--navy),var(--navy2));color:var(--heroText);padding:18px 20px 22px;border-radius:0 0 22px 22px}
.hero .top{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;font-weight:500;opacity:.82;letter-spacing:.2px}
.hero h1{font-size:25px;font-weight:800;letter-spacing:-.4px;margin:10px 0 3px}
.hero .sub{font-size:13px;opacity:.85}
.chips{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.chip{font-size:12px;font-weight:600;background:rgba(255,255,255,.15);padding:5px 11px;border-radius:999px}
main{flex:1;padding:16px;overflow:auto}
.lead{font-size:12.5px;color:var(--muted);margin:2px 2px 12px;font-weight:500}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;margin-bottom:13px;box-shadow:var(--shadow)}
.card h3{margin:0 0 10px;font-size:11.5px;letter-spacing:.5px;text-transform:uppercase;color:var(--muted);font-weight:700}
.mrow{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.give{font-size:12px;color:var(--muted);font-weight:500}
.get{font-weight:700;font-size:16.5px;letter-spacing:-.2px;margin-top:3px}
.score{font-size:11px;font-weight:700;color:#fff;background:var(--green);padding:4px 10px;border-radius:999px;white-space:nowrap}
.score.part{background:var(--amber);color:#04121a}.score.bad{background:var(--red)}
.tag{font-size:11px;font-weight:600;padding:5px 10px;border-radius:8px;background:var(--tagBg);color:var(--tagInk);margin:8px 6px 0 0;display:inline-flex;gap:5px;align-items:center}
.tag.no{background:rgba(225,29,72,.12);color:var(--red)}
.chain{font-size:12.5px;color:var(--accent);font-weight:700;background:var(--chainBg);padding:6px 10px;border-radius:9px;margin-top:10px;display:inline-block}
.foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px;padding-top:13px;border-top:1px solid var(--line)}
.with{font-size:12px;color:var(--muted);font-weight:500}
.btn{border:0;font-weight:600;font-size:13px;padding:11px 16px;border-radius:12px;cursor:pointer;font-family:inherit}
.btn.p{background:var(--navy);color:#fff}.btn.g{background:var(--wa);color:#fff;text-decoration:none}.btn.r{background:var(--red);color:#fff}
.btn.ghost{background:var(--card2);color:var(--ink);border:1px solid var(--line)}
.btn.block{width:100%}
.sector{display:flex;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line)}
.sector:last-child{border-bottom:0}.fno{font-weight:700;min-width:60px}
.crew{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.crew:last-child{border-bottom:0}
.av{width:38px;height:38px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}
.who{flex:1;min-width:0}.who .nm{font-weight:600;font-size:14px}.who .rk{font-size:12px;color:var(--muted)}
.reg{font-size:10px;font-weight:700;color:var(--green);background:var(--tagBg);padding:2px 7px;border-radius:6px;margin-left:6px}
.warn{display:flex;gap:10px;background:rgba(232,163,61,.12);border:1px solid rgba(232,163,61,.35);color:var(--amber);border-radius:12px;padding:10px 12px;font-size:13px;margin-bottom:14px}
nav{display:flex;background:var(--card);border-top:1px solid var(--line);position:sticky;bottom:0}
nav button{flex:1;background:none;border:0;padding:10px 0;font-size:11px;color:var(--muted);cursor:pointer;font-family:inherit;font-weight:500}
nav button.on{color:var(--accent);font-weight:700}
nav button i{display:block;font-size:17px;font-style:normal;margin-bottom:2px}
.auth{max-width:380px;margin:0 auto;padding:40px 22px;min-height:100vh;display:flex;flex-direction:column;justify-content:center}
.auth .logo{text-align:center;font-size:27px;font-weight:800;letter-spacing:-.5px;color:var(--accent);margin-bottom:4px}
.auth .tag2{text-align:center;color:var(--muted);font-size:13px;margin-bottom:26px}
.field{margin-bottom:14px}.field label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:5px}
.field input{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;font-size:16px;background:var(--card2);color:var(--ink);font-family:inherit}
input[type=date]{width:100%;padding:11px;border:1px solid var(--line);border-radius:12px;font-size:16px;background:var(--card2);color:var(--ink);font-family:inherit}
.err{color:var(--red);font-size:13px;margin:6px 0}
.toggle{display:flex;align-items:center;justify-content:space-between}
.switch{width:50px;height:30px;border-radius:999px;background:var(--line);position:relative;cursor:pointer;transition:.2s;border:0}
.switch.on{background:var(--accent)}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;transition:.2s}
.switch.on::after{left:23px}
.lgd{display:inline-block;width:11px;height:11px;border-radius:3px;vertical-align:-1px;margin:0 2px}
.gantt{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card);-webkit-overflow-scrolling:touch}
.grow{display:grid;position:relative;align-items:stretch;border-bottom:1px solid var(--line);min-height:34px}
.grow:last-child{border-bottom:0}
.grow.head{position:sticky;top:0;z-index:4;background:var(--card)}
.gname{grid-column:1;grid-row:1;position:sticky;left:0;z-index:3;background:var(--card);border-right:1px solid var(--line);
  display:flex;align-items:center;padding:0 8px;font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ghead{border-bottom:1px solid var(--line)}
.ghd{grid-row:1;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:9px;color:var(--muted);border-right:1px solid var(--line);padding:3px 0}
.ghd b{font-size:11px;color:var(--ink);font-weight:600}
.ghd.we,.gc.we{background:rgba(100,116,139,.07)}
.gc{grid-row:1;border-right:1px solid var(--line)}
.gbar{grid-row:1;align-self:center;height:22px;margin:0 1px;border-radius:6px;color:#fff;
  font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;overflow:hidden;z-index:2;white-space:nowrap;letter-spacing:.2px}
/* item colours (also used as legend dots via .lgd) */
.b-trip{background:var(--accent)}
.b-off{background:var(--red)}
.b-grant{background:var(--green)}
.b-sim{background:#7c3aed}
.b-req{background:transparent;color:var(--amber);border:1.5px dashed var(--amber)}
.b-day{background:#94a3b8}
.b-leave{background:#0ea5e9}
.b-sby{background:#f59e0b;color:#04121a}
.lgd.b-req{border:1.5px dashed var(--amber)}
/* My Trips colour accents: green=granted request, red=offered for swap */
.card.trip{border-left:5px solid var(--accent)}
.card.trip.granted{border-left-color:var(--green)}
.card.trip.offered{border-left-color:var(--red);background:linear-gradient(90deg,rgba(225,29,72,.05),var(--card) 12%)}
.hidden{display:none}

/* ── Wider layout on laptops/desktops ─────────────────────────────────────── */
@media (min-width: 820px){
  .app{max-width:1100px}
  .hero{border-radius:0 0 26px 26px;padding:20px 28px 22px}
  main{padding:20px 28px}
  /* card list views: 2 columns so the width is used, cards stay readable */
  main>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px;align-content:start}
  main>div>.lead,main>div>.gantt,main>div>[style*="justify-content:space-between"]{grid-column:1 / -1}
  /* the Master Gantt spans full width and shows more days before scrolling */
  .gantt{width:100%}
}
@media (min-width: 1140px){
  .app{max-width:1240px}
}