/* ===========================================================
   Online Inclinometer — Design System
   Instrument / blueprint aesthetic. Spirit-level as signature.
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@500;600;700;800&family=Work+Sans:wght@400;500;600;700&family=Roboto+Mono:wght@500;600&display=swap');

:root{
  --paper:#F6F8FA;
  --paper-raised:#FFFFFF;
  --ink:#101826;
  --ink-soft:#4B5563;
  --ink-faint:#8A94A6;
  --line:#D8DEE8;
  --line-soft:#E7EBF1;
  --blue:#2F6FED;
  --blue-dim:#E8EFFE;
  --blue-deep:#1D4FBF;
  --green:#1FA971;
  --green-dim:#E4F6EE;
  --amber:#E2725B;
  --amber-dim:#FBEAE6;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --shadow-card:0 1px 2px rgba(16,24,38,.04), 0 8px 24px rgba(16,24,38,.05);
  --shadow-pop:0 4px 10px rgba(16,24,38,.06), 0 20px 40px rgba(16,24,38,.08);
  --font-display:'Sora', sans-serif;
  --font-body:'Work Sans', sans-serif;
  --font-mono:'Roboto Mono', monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:#FFFFFF;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
[dir="rtl"] body{direction:rtl;}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;letter-spacing:-0.01em;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2.5px solid var(--blue);outline-offset:2px;}

.container{max-width:1120px;margin:0 auto;padding:0 24px;}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--blue-deep);
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:18px;height:1.5px;background:var(--blue);display:inline-block;}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(246,248,250,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1120px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:700;font-size:18px;}
.brand-mark{
  width:30px;height:30px;border-radius:50%;
  border:2.5px solid var(--ink);
  position:relative;flex:none;
  background:
    linear-gradient(var(--paper-raised),var(--paper-raised)) padding-box;
}
.brand-mark::before{
  content:"";position:absolute;left:50%;top:50%;
  width:9px;height:9px;border-radius:50%;
  background:var(--green);
  transform:translate(-50%,-50%) translate(2px,-1px);
}
.brand-mark::after{
  content:"";position:absolute;left:8%;right:8%;top:50%;
  height:1px;background:var(--line);
}
.brand small{font-weight:500;color:var(--blue-deep);}

.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--ink-soft);transition:color .15s;}
.nav-links a:hover{color:var(--ink);}
.nav-cta{display:flex;align-items:center;gap:14px;}

.lang-pill{
  display:flex;align-items:center;gap:6px;
  border:1px solid var(--line);background:var(--paper-raised);
  border-radius:100px;padding:7px 12px 7px 10px;
  font-size:13px;font-weight:600;color:var(--ink-soft);
}
.lang-pill svg{width:14px;height:14px;stroke:var(--blue);}
.lang-pill select{
  border:none;background:transparent;font:inherit;color:var(--ink);
  font-weight:600;appearance:none;padding-right:2px;cursor:pointer;
}

.nav-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:10px;
  width:40px;height:40px;align-items:center;justify-content:center;flex:none;
}
.nav-toggle svg{width:20px;height:20px;stroke:var(--ink);}
.nav-drawer{display:none;}

@media (max-width:860px){
  .nav-toggle{display:flex;}
  .nav-links{display:none;}
  .nav-cta .lang-pill{display:none;}
  .nav-drawer{
    display:block;max-height:0;overflow:hidden;
    border-top:0 solid var(--line);
    transition:max-height .25s ease;
    background:var(--paper-raised);
  }
  .nav-drawer.open{max-height:600px;border-top-width:1px;}
  .nav-drawer-inner{padding:16px 24px 22px;display:flex;flex-direction:column;gap:4px;}
  .nav-drawer a{
    padding:11px 4px;font-size:15px;font-weight:600;color:var(--ink);
    border-bottom:1px solid var(--line-soft);
  }
  .nav-drawer-langs{margin-top:14px;}
  .nav-drawer-langs .label{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:10px;}
  .nav-drawer-lang-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
  .nav-drawer-lang-grid button{
    border:1px solid var(--line);background:var(--paper);border-radius:100px;
    padding:8px 12px;font-size:13px;font-weight:600;color:var(--ink-soft);text-align:left;
  }
  .nav-drawer-lang-grid button.active{background:var(--ink);color:#fff;border-color:var(--ink);}
}


/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:100px;font-weight:600;font-size:14.5px;
  border:1.5px solid transparent;transition:transform .12s, box-shadow .12s, background .12s;
}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-pop);}
.btn-outline{border-color:var(--line);background:var(--paper-raised);color:var(--ink);}
.btn-outline:hover{border-color:var(--blue);color:var(--blue-deep);}
.btn-block{width:100%;}

/* ---------- Hero ---------- */
.hero{padding:64px 0 40px;text-align:center;}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.08;max-width:820px;margin:18px auto 14px;}
.hero .lede{max-width:600px;margin:0 auto;color:var(--ink-soft);font-size:16.5px;}
.hero-badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:22px;}
.badge{
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  padding:6px 12px;border-radius:100px;border:1px solid var(--line);
  background:var(--paper-raised);color:var(--ink-soft);
}
.badge.on{background:var(--green-dim);border-color:transparent;color:#0F7A50;}

/* ---------- Instrument card ---------- */
.instrument-card{
  max-width:640px;margin:34px auto 0;
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  text-align:left;
}
.instrument-toolbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;border-bottom:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:12px;color:var(--ink-faint);
}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--ink-faint);display:inline-block;margin-inline-end:6px;}
.status-dot.live{background:var(--green);box-shadow:0 0 0 3px var(--green-dim);}
.instrument-body{padding:30px 30px 26px;display:flex;flex-direction:column;align-items:center;gap:22px;}

.gauge-wrap{position:relative;width:280px;height:280px;}
.gauge-wrap svg{width:100%;height:100%;}
.gauge-readout{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;pointer-events:none;
}
.gauge-readout .rl-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--ink-faint);text-transform:uppercase;}

.readout-grid{display:flex;gap:14px;width:100%;}
.readout-box{
  flex:1;background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius-sm);
  padding:14px 16px;text-align:center;
}
.readout-box .label{font-family:var(--font-mono);font-size:11px;letter-spacing:.09em;color:var(--ink-faint);text-transform:uppercase;}
.readout-box .value{font-family:var(--font-mono);font-size:26px;font-weight:600;margin-top:4px;}
.readout-box.level .value{color:#0F7A50;}

.instrument-controls{display:flex;gap:10px;width:100%;}
.instrument-controls .btn{flex:1;}

.instrument-foot{
  border-top:1px solid var(--line-soft);
  background:var(--paper);
  padding:14px 20px;font-size:13px;color:var(--ink-soft);
  display:flex;align-items:center;gap:10px;
}
.instrument-foot svg{flex:none;width:16px;height:16px;stroke:var(--blue);}

.sensor-note{
  max-width:640px;margin:16px auto 0;
  background:var(--blue-dim);border:1px solid #CBDBFB;border-radius:var(--radius-md);
  padding:14px 18px;font-size:13.5px;color:var(--blue-deep);
  display:flex;gap:10px;text-align:left;
}
.sensor-note svg{flex:none;width:18px;height:18px;margin-top:1px;stroke:var(--blue-deep);}

/* ---------- Sections ---------- */
.section{padding:76px 0;}
.section-head{max-width:640px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:14px 0 10px;}
.section-head p{color:var(--ink-soft);font-size:15.5px;}
.section.alt{background:var(--paper-raised);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}

/* feature grid */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  background:var(--paper-raised);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:26px;box-shadow:var(--shadow-card);
}
.card .icon{
  width:44px;height:44px;border-radius:12px;background:var(--blue-dim);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.card .icon svg{width:22px;height:22px;stroke:var(--blue-deep);}
.card h3{font-size:17px;margin-bottom:8px;}
.card p{color:var(--ink-soft);font-size:14.5px;}

/* numbered steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step;}
.step{border:1px solid var(--line);border-radius:var(--radius-md);padding:24px;background:var(--paper-raised);position:relative;}
.step .num{
  font-family:var(--font-mono);font-weight:600;font-size:13px;color:var(--blue-deep);
  background:var(--blue-dim);width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.step h3{font-size:15.5px;margin-bottom:6px;}
.step p{font-size:14px;color:var(--ink-soft);}

/* diagram illustrations for calibration methods */
.diagram-card{
  border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper-raised);
  padding:24px;box-shadow:var(--shadow-card);
}
.diagram-card svg{width:100%;height:auto;margin-bottom:16px;}
.diagram-card h3{font-size:16px;margin-bottom:8px;}
.diagram-card p{font-size:14px;color:var(--ink-soft);}
.diagram-card ol{margin:12px 0 0;padding-inline-start:18px;color:var(--ink-soft);font-size:14px;}
.diagram-card li{margin-bottom:5px;}

/* use cases */
.usecase{
  display:flex;gap:16px;border:1px solid var(--line);border-radius:var(--radius-md);
  background:var(--paper-raised);padding:22px;
}
.usecase .icon{
  flex:none;width:42px;height:42px;border-radius:11px;background:var(--green-dim);
  display:flex;align-items:center;justify-content:center;
}
.usecase .icon svg{width:20px;height:20px;stroke:#0F7A50;}
.usecase h3{font-size:15.5px;margin-bottom:6px;}
.usecase p{font-size:14px;color:var(--ink-soft);}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:none;padding:20px 4px;text-align:left;
  font-family:var(--font-body);font-weight:600;font-size:15.5px;color:var(--ink);
}
[dir="rtl"] .faq-q{text-align:right;}
.faq-q .plus{
  flex:none;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--blue-deep);
  transition:transform .2s;
}
.faq-item[open] .faq-q .plus{transform:rotate(45deg);border-color:var(--blue);}
.faq-a{padding:0 4px 20px;color:var(--ink-soft);font-size:14.5px;max-width:760px;}
.faq-item summary{list-style:none;cursor:pointer;}
.faq-item summary::-webkit-details-marker{display:none;}

/* privacy strip */
.privacy-strip{
  display:flex;align-items:center;gap:18px;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--green-dim);padding:26px 30px;
}
.privacy-strip .icon{
  flex:none;width:48px;height:48px;border-radius:14px;background:#fff;
  display:flex;align-items:center;justify-content:center;
}
.privacy-strip .icon svg{width:24px;height:24px;stroke:#0F7A50;}
.privacy-strip h3{font-size:16.5px;margin-bottom:4px;}
.privacy-strip p{font-size:14px;color:#256B4D;}

/* CTA band */
.cta-band{
  text-align:center;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--paper-raised);padding:56px 30px;box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:10px;}
.cta-band p{color:var(--ink-soft);margin-bottom:22px;}

/* generic content page */
.doc{max-width:760px;margin:0 auto;padding:56px 0 90px;}
.doc h1{font-size:clamp(28px,4vw,38px);margin:14px 0 6px;}
.doc .updated{font-family:var(--font-mono);font-size:12.5px;color:var(--ink-faint);}
.doc h2{font-size:20px;margin:36px 0 12px;}
.doc p, .doc li{color:var(--ink-soft);font-size:15px;line-height:1.7;}
.doc ul, .doc ol{padding-inline-start:20px;}
.doc li{margin-bottom:6px;}
.doc a{color:var(--blue-deep);font-weight:600;text-decoration:underline;text-underline-offset:2px;}

.contact-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:26px;align-items:start;}
.contact-card{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper-raised);padding:26px;box-shadow:var(--shadow-card);}
.contact-card h3{font-size:15px;margin-bottom:4px;}
.contact-card p{font-size:14px;color:var(--ink-soft);}
.contact-card + .contact-card{margin-top:16px;}
.form-field{margin-bottom:16px;}
.form-field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;}
.form-field input, .form-field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:11px 13px;font:inherit;font-size:14.5px;background:var(--paper);color:var(--ink);
}
.form-field textarea{resize:vertical;min-height:110px;}
.form-field input:focus, .form-field textarea:focus{outline:none;border-color:var(--blue);background:#fff;}

/* team / about */
.value-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}

/* footer */
.footer{border-top:1px solid var(--line);background:var(--paper-raised);padding:48px 0 26px;margin-top:20px;}
.footer-top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:36px;}
.footer-brand p{color:var(--ink-soft);font-size:14px;max-width:280px;margin-top:10px;}
.footer-cols{display:flex;gap:56px;flex-wrap:wrap;}
.footer-col h4{font-family:var(--font-mono);font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:14px;}
.footer-col a{display:block;font-size:14px;color:var(--ink-soft);margin-bottom:10px;}
.footer-col a:hover{color:var(--ink);}
.footer-lang{display:flex;flex-wrap:wrap;gap:8px;padding-top:24px;border-top:1px solid var(--line-soft);}
.footer-lang button{
  border:1px solid var(--line);background:var(--paper);border-radius:100px;
  padding:6px 13px;font-size:12.5px;font-weight:600;color:var(--ink-soft);
}
.footer-lang button.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:22px;font-size:12.5px;color:var(--ink-faint);flex-wrap:wrap;gap:10px;}

@media (max-width:860px){
  .nav-links{display:none;}
  .grid-2,.grid-3,.steps,.value-row{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-top{flex-direction:column;}
}