/* ── بوصلة · Nautical Converter — design tokens ── */
:root{
  --ink:#0A0907;
  --ink-2:#12100B;
  --ink-3:#181510;
  --gold:#D4AF37;
  --gold-lt:#F7E39B;
  --gold-md:#E3C567;
  --gold-dp:#9C7411;
  --cream:#F5EFE2;
  --muted:#A79C86;
  --line:rgba(212,175,55,.20);
  --line-strong:rgba(212,175,55,.38);
  --panel:rgba(255,255,255,.035);
  --panel-2:rgba(255,255,255,.055);
  --grad-gold:linear-gradient(120deg,#9C7411 0%,#D4AF37 28%,#F7E39B 52%,#D4AF37 74%,#9C7411 100%);
  --shadow:0 18px 60px rgba(0,0,0,.55);
  --radius:18px;
  --radius-sm:12px;
  --font-display:'Reem Kufi',system-ui,sans-serif;
  --font-body:'IBM Plex Sans Arabic','Segoe UI',system-ui,sans-serif;
  --font-mono:'Jost',ui-monospace,monospace;
  --maxw:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;min-height:100dvh;background:var(--ink);color:var(--cream);
  font-family:var(--font-body);line-height:1.75;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.35;margin:0;letter-spacing:0}
p{margin:0}
a{color:inherit;text-decoration:none}
button,input,select,output{font-family:inherit;color:inherit}
.ic{width:18px;height:18px;stroke-width:1.75;flex:none}
.mono{font-family:var(--font-mono);letter-spacing:.02em}

.bg-aurora{position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(ellipse 70% 45% at 78% -8%,rgba(212,175,55,.16),transparent 62%),
    radial-gradient(ellipse 55% 40% at 12% 8%,rgba(156,116,17,.14),transparent 65%),
    radial-gradient(ellipse 90% 55% at 50% 108%,rgba(212,175,55,.07),transparent 60%);
}
.bg-lines{position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background-image:repeating-linear-gradient(90deg,rgba(212,175,55,.045) 0 1px,transparent 1px 92px);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 10%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 10%,transparent 75%);
}
.gold-text{background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.fade-up{animation:fadeUp .7s cubic-bezier(.2,.7,.2,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ── Navbar ── */
.nav{position:sticky;top:0;z-index:40;background:rgba(10,9,7,.72);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:.7rem 1.5rem;display:flex;align-items:center;gap:1.25rem}
.brand{display:flex;align-items:center;gap:.7rem;cursor:pointer}
.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:50%;
  background:radial-gradient(circle at 50% 30%,rgba(212,175,55,.18),transparent 70%);
  border:1px solid var(--line-strong)}
.brand-mark svg{width:30px;height:30px;animation:spin 46s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-family:var(--font-display);font-size:1.32rem;
  background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-text em{font-family:var(--font-mono);font-style:normal;font-size:.6rem;letter-spacing:.28em;color:var(--muted)}
.nav-links{display:flex;gap:1.6rem;margin-inline-start:auto}
.nav-link{font-size:.9rem;color:var(--muted);position:relative;padding:.3rem 0;transition:color .25s}
.nav-link::after{content:'';position:absolute;inset-inline:0;bottom:0;height:1px;
  background:var(--grad-gold);transform:scaleX(0);transform-origin:right;transition:transform .3s}
.nav-link:hover,.nav-link.is-active{color:var(--gold-lt)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}

/* ── Hero ── */
.hero{max-width:var(--maxw);margin:0 auto;padding:5rem 1.5rem 3rem;text-align:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.75rem;letter-spacing:.14em;
  color:var(--gold-md);border:1px solid var(--line);border-radius:999px;padding:.35rem 1rem;
  background:rgba(212,175,55,.06);margin-bottom:1.6rem}
.hero h1{font-size:clamp(2rem,5.4vw,3.5rem);margin-bottom:1.1rem}
.hero-sub{color:var(--muted);font-size:clamp(.95rem,1.6vw,1.08rem);max-width:640px;margin:0 auto 2.6rem}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--line)}
.hero-stats .stat{background:var(--ink-2);padding:1.1rem .8rem;display:flex;flex-direction:column;gap:.15rem;
  transition:background .3s}
.hero-stats .stat:hover{background:var(--ink-3)}
.hero-stats b{font-family:var(--font-mono);font-size:1.5rem;font-weight:500;
  background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:.76rem;color:var(--muted)}

/* ── Layout & panel ── */
.section{max-width:var(--maxw);margin:0 auto;padding:2.5rem 1.5rem;position:relative;z-index:1}
.section-head{margin-bottom:1.6rem}
.section-head h2{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:.4rem}
.section-head p{color:var(--muted);font-size:.95rem;max-width:620px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.6rem;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);position:relative;overflow:hidden}
.panel::before{content:'';position:absolute;inset-inline:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(247,227,155,.55),transparent)}
.panel-head{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;margin-bottom:1.3rem}
.panel-head h2,.panel-sub{font-size:1.15rem;display:flex;align-items:center;gap:.55rem}
.panel-sub{margin-bottom:1rem}
.panel-head .ic,.panel-sub .ic{color:var(--gold)}
.precision{display:flex;align-items:center;gap:.7rem;font-size:.8rem;color:var(--muted)}
.precision input[type=range]{width:110px;accent-color:var(--gold);cursor:pointer}
.precision output{font-family:var(--font-mono);color:var(--gold-lt);min-width:1ch}

/* ── Category chips ── */
.chips{display:flex;gap:.5rem;overflow-x:auto;padding-bottom:.6rem;margin-bottom:1.5rem;scrollbar-width:thin}
.chips::-webkit-scrollbar{height:5px}
.chips::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:99px}
.chip{white-space:nowrap;padding:.5rem 1.05rem;border-radius:999px;font-size:.86rem;cursor:pointer;
  border:1px solid var(--line);background:transparent;color:var(--muted);
  transition:color .25s,border-color .25s,background .25s,transform .25s}
.chip:hover{color:var(--cream);border-color:var(--line-strong);transform:translateY(-2px)}
.chip.is-active{background:var(--grad-gold);color:#241B03;border-color:transparent;font-weight:600;
  box-shadow:0 8px 26px rgba(212,175,55,.22)}

/* ── Converter ── */
.conv{display:grid;grid-template-columns:1fr auto 1fr;gap:1rem;align-items:end}
.field{display:flex;flex-direction:column;gap:.5rem;background:var(--panel-2);
  border:1px solid var(--line);border-radius:var(--radius-sm);padding:1rem 1.1rem;
  transition:border-color .3s,box-shadow .3s}
.field:focus-within{border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(212,175,55,.12)}
.field-label{font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-md)}
.field input[type=number]{width:100%;background:transparent;border:none;outline:none;
  font-family:var(--font-mono);font-size:clamp(1.6rem,3.6vw,2.3rem);padding:0;color:var(--cream)}
.field select{width:100%;background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:9px;
  padding:.5rem .75rem;font-size:.9rem;outline:none;cursor:pointer;transition:border-color .25s}
.field select:focus{border-color:var(--gold)}
.field select option{background:#15120C;color:var(--cream)}
.result-value{font-family:var(--font-mono);font-size:clamp(1.6rem,3.6vw,2.3rem);min-height:1.5em;
  background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent;
  direction:ltr;text-align:right;word-break:break-all;transition:opacity .2s}
.swap{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;cursor:pointer;
  background:var(--ink-2);border:1px solid var(--line-strong);color:var(--gold);margin-bottom:1.5rem;
  transition:transform .35s cubic-bezier(.2,.7,.2,1),background .25s,box-shadow .25s}
.swap:hover{transform:rotate(180deg);background:rgba(212,175,55,.12);box-shadow:0 8px 28px rgba(212,175,55,.2)}
.formula{margin-top:1rem;font-size:.85rem;color:var(--muted);font-family:var(--font-mono)}
.formula b{color:var(--gold-lt);font-weight:500}

/* ── Quick grid (all units) ── */
.quick{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:.7rem;margin-top:1.4rem}
.quick-card{background:rgba(255,255,255,.025);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:.7rem .85rem;cursor:pointer;text-align:start;transition:transform .25s,border-color .25s,background .25s}
.quick-card:hover{transform:translateY(-3px);border-color:var(--line-strong);background:rgba(212,175,55,.07)}
.quick-card span{display:block;font-size:.74rem;color:var(--muted);margin-bottom:.2rem}
.quick-card b{font-family:var(--font-mono);font-size:1.05rem;font-weight:500;direction:ltr;display:block;color:var(--gold-lt)}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;cursor:pointer;
  padding:.68rem 1.3rem;border-radius:999px;font-size:.88rem;font-weight:600;border:1px solid transparent;
  transition:transform .2s,box-shadow .25s,background .25s,border-color .25s}
.btn:active{transform:translateY(1px)}
.btn-gold{background:var(--grad-gold);color:#241B03;box-shadow:0 10px 34px rgba(212,175,55,.22)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 14px 44px rgba(212,175,55,.34)}
.btn-ghost{border-color:var(--line-strong);background:transparent;color:var(--gold-lt)}
.btn-ghost:hover{background:rgba(212,175,55,.1)}
.btn-icon{padding:.5rem;width:42px;height:42px;border-radius:50%}

/* ── Tabs ── */
.tabs{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.2rem}
.tab{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.2rem;border-radius:999px;
  font-size:.88rem;font-weight:500;cursor:pointer;color:var(--muted);background:rgba(255,255,255,.03);
  border:1px solid var(--line);transition:all .25s}
.tab:hover{color:var(--cream);border-color:var(--line-strong)}
.tab.is-active{color:var(--gold-lt);border-color:var(--line-strong);background:rgba(212,175,55,.1)}
.tool-panel{display:none;animation:fadeUp .45s ease both}
.tool-panel.is-active{display:block}
.hint{font-size:.85rem;color:var(--muted);margin-bottom:1.2rem}
.hint .mono{color:var(--gold-md)}

/* ── Tool inputs ── */
.nav-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.9rem}
.nav-grid.two{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.input-box{display:flex;flex-direction:column;gap:.45rem;font-size:.78rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--gold-md)}
.input-box .row{display:flex;gap:.5rem;align-items:center}
.input-box input,.parse input{width:100%;background:rgba(0,0,0,.4);border:1px solid var(--line);
  border-radius:10px;padding:.62rem .85rem;outline:none;font-family:var(--font-mono);font-size:1rem;
  transition:border-color .25s,box-shadow .25s;direction:ltr;text-align:right}
.input-box input:focus,.parse input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(212,175,55,.12)}
.input-box select{background:rgba(0,0,0,.4);border:1px solid var(--line);border-radius:10px;
  padding:.62rem .6rem;font-size:.85rem;outline:none;cursor:pointer;min-width:132px}
.input-box select option{background:#15120C}
.row-actions{display:flex;flex-wrap:wrap;gap:.9rem;align-items:center;margin:1.3rem 0}
.seg{display:flex;gap:.15rem;padding:.22rem;border:1px solid var(--line);border-radius:999px;background:rgba(0,0,0,.3)}
.seg-item{border:none;background:transparent;color:var(--muted);font-size:.82rem;padding:.42rem .95rem;
  border-radius:999px;cursor:pointer;transition:all .25s;min-height:38px;display:inline-flex;
  align-items:center;justify-content:center}
.seg-item:hover{color:var(--cream)}
.seg-item.is-active{background:var(--grad-gold);color:#241B03;font-weight:600}
.readout{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:.7rem;margin-top:1rem}
.readout.muted{color:var(--muted)}
.readout .out{background:rgba(212,175,55,.06);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:.75rem .9rem}
.readout .out span{display:block;font-size:.72rem;color:var(--muted);margin-bottom:.25rem}
.readout .out b{font-family:var(--font-mono);font-size:1.12rem;font-weight:500;color:var(--gold-lt);
  direction:ltr;display:block;word-break:break-word}
.parse{margin-top:1.2rem;display:flex;flex-direction:column;gap:.5rem}
.parse .field-label{font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-md)}
.divider{height:1px;background:var(--line);margin:1.8rem 0}

/* ── Reference table ── */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.ref-table{width:100%;border-collapse:collapse;font-size:.9rem}
.ref-table thead th{background:rgba(212,175,55,.09);color:var(--gold-md);font-weight:600;font-size:.78rem;
  letter-spacing:.08em;text-transform:uppercase;padding:.85rem 1rem;text-align:start}
.ref-table td{padding:.85rem 1rem;border-top:1px solid rgba(212,175,55,.1);color:var(--cream)}
.ref-table tbody tr{transition:background .25s}
.ref-table tbody tr:hover{background:rgba(212,175,55,.05)}
.ref-table td:first-child{color:var(--gold-lt);font-weight:500}
.ref-table td:nth-child(2){font-family:var(--font-mono)}
.ref-table td:last-child{color:var(--muted);font-size:.85rem}

/* ── Footer ── */
.footer{border-top:1px solid var(--line);margin-top:3rem;position:relative;z-index:1;
  background:linear-gradient(180deg,transparent,rgba(212,175,55,.04))}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:2rem 1.5rem;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:center;gap:.9rem;font-size:.83rem;color:var(--muted)}
.footer-brand{font-family:var(--font-display);font-size:1.15rem;
  background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.footer-dot{width:4px;height:4px;border-radius:50%;background:var(--gold);opacity:.6}
.footer-mono{font-family:var(--font-mono);letter-spacing:.14em;font-size:.74rem;color:var(--gold-md)}

/* ── Toast ── */
.toast-wrap{position:fixed;bottom:1.4rem;inset-inline-end:1.4rem;z-index:90;display:flex;
  flex-direction:column;gap:.5rem}
.toast{padding:.7rem 1.1rem;border-radius:12px;font-size:.86rem;background:rgba(21,18,12,.95);
  border:1px solid var(--line-strong);color:var(--gold-lt);box-shadow:var(--shadow);
  animation:fadeUp .3s ease both}

/* ── Responsive ── */
@media (max-width:900px){
  .conv{grid-template-columns:1fr}
  .swap{justify-self:center;margin:0}
  .nav-links{display:none}
  .hero{padding:3.2rem 1.2rem 2rem}
}
@media (max-width:640px){
  .panel{padding:1.15rem}
  .section{padding:1.8rem 1rem}
  .ref-table{font-size:.8rem}
  .ref-table thead th,.ref-table td{padding:.65rem .7rem}
  .nav-inner{padding:.6rem 1rem}
}