/* Sam's Digital Instruments — shared styles across all pages */
:root{
  --bg: #0f1214;
  --panel: #161b1c;
  --panel-2: #1c2324;
  --panel-3: #222a2b;
  --line: #253030;
  --text: #7FD4FF;
  --text-strong: #C7ECFF;
  --text-dim: #86AEC4;
  --accent: #38BDF8;
  --accent-ink: #041c2b;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Manrope', sans-serif;
}
*{ box-sizing:border-box; }
html,body{
  margin:0; padding:0; background:var(--bg); color:var(--text);
  font-family:var(--sans); -webkit-font-smoothing:antialiased;
}
body{ min-height:100vh; display:flex; flex-direction:column; }
a{ color:var(--accent); }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible{
  outline:2px solid var(--accent); outline-offset:2px;
}

/* ---- status bar ---- */
.statusbar{
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 22px; border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, #12171a, #0f1214);
  font-family:var(--mono); font-size:12.5px; color:var(--text-dim);
  letter-spacing:.03em;
}
.statusbar .live{ display:flex; align-items:center; gap:8px; color:var(--text); }
.dot{ width:6px; height:6px; border-radius:50%; background:var(--accent);
  box-shadow:0 0 0 3px rgba(56,189,248,0.18); animation:pulse 2s infinite ease-in-out; }
@keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:.35;} }

/* ---- breadcrumb ---- */
.breadcrumb{
  max-width:920px; margin:0 auto; width:100%; padding:16px 22px 0;
  font-family:var(--mono); font-size:12px; color:var(--text-dim);
}
.breadcrumb a{ color:var(--text-dim); text-decoration:none; }
.breadcrumb a:hover{ color:var(--text-strong); text-decoration:underline; }
.breadcrumb .sep{ margin:0 6px; }
.breadcrumb .current{ color:var(--text); }

/* ---- header / hero ---- */
header.hero{ padding:24px 22px 18px; max-width:920px; margin:0 auto; width:100%; }
.wordmark{ font-family:var(--mono); font-size:13px; letter-spacing:.18em; color:var(--accent); text-transform:uppercase; margin:0 0 10px; }
h1{ font-family:var(--sans); font-weight:800; font-size:clamp(26px,4.2vw,40px); margin:0 0 8px; line-height:1.05; letter-spacing:-0.01em; color:var(--text-strong); }
.sub{ color:var(--text); font-size:15px; max-width:60ch; line-height:1.5; margin:0; }

main{ flex:1; max-width:920px; margin:0 auto; padding:10px 22px 60px; width:100%;
      display:flex; flex-direction:column; gap:28px; }

.section-label{ font-family:var(--mono); font-size:12px; font-weight:400; letter-spacing:.14em; text-transform:uppercase; color:var(--text-dim); margin:0 0 12px; }

.panel{ background:var(--panel); border:1px solid var(--line); border-radius:16px; padding:26px; }

.prose{ max-width:760px; }
.prose p{ color:var(--text); font-size:14.5px; line-height:1.75; margin:0 0 14px; }
.prose p:last-child{ margin-bottom:0; }

.info-block{ max-width:760px; margin-top:16px; }
.info-block p{ color:var(--text); font-size:14px; line-height:1.65; margin:0 0 10px; }
.info-block p:last-child{ margin-bottom:0; }

/* ---- directory / featured tool cards (homepage) ---- */
.tool-directory{ display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:18px; }
.tool-card{
  background:var(--panel); border:1px solid var(--line); border-radius:16px;
  padding:22px; display:flex; flex-direction:column; gap:10px; text-decoration:none;
  transition:border-color .15s ease;
}
.tool-card:hover{ border-color:var(--accent); }
.tool-card .cat{ font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--accent); }
.tool-card h2{ color:var(--text-strong); font-size:19px; margin:0; }
.tool-card p{ color:var(--text); font-size:14px; line-height:1.6; margin:0; }
.tool-card .go{ color:var(--text-dim); font-family:var(--mono); font-size:12.5px; margin-top:4px; }

.categories{ display:flex; flex-wrap:wrap; gap:10px; }
.category-tag{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text);
  font-family:var(--mono); font-size:12px; padding:7px 14px; border-radius:20px;
}

.related-tools{ display:flex; flex-wrap:wrap; gap:10px; }
.related-tools a{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text-strong);
  font-family:var(--sans); font-weight:600; font-size:13.5px; padding:10px 16px;
  border-radius:10px; text-decoration:none;
}
.related-tools a:hover{ border-color:var(--accent); }

/* ---- generic form controls ---- */
select, input[type=number]{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text-strong);
  font-family:var(--sans); font-size:14px; font-weight:600; padding:10px 12px; border-radius:9px;
  outline:none; transition:border-color .15s ease; width:100%;
}
select:focus, input:focus{ border-color:var(--accent); }
label{ display:block; font-size:12px; color:var(--text); font-weight:600; margin-bottom:6px; text-transform:uppercase; letter-spacing:.04em; }
.field{ display:flex; flex-direction:column; }
button.action{
  appearance:none; border:1px solid var(--accent); background:var(--accent);
  color:var(--accent-ink); font-weight:700; font-size:14px; padding:11px 18px; border-radius:9px;
  cursor:pointer; transition:filter .15s ease;
}
button.action:hover{ filter:brightness(1.08); }

.mode-toggle{ display:flex; justify-content:center; gap:8px; margin-bottom:18px; }
.mode-btn{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text-dim);
  font-family:var(--mono); font-size:12.5px; font-weight:600; letter-spacing:.04em;
  padding:7px 16px; border-radius:20px; cursor:pointer;
}
.mode-btn.active{ color:var(--accent-ink); background:var(--accent); border-color:var(--accent); }

/* ---- flip clock ---- */
.flip-clock{ display:flex; align-items:center; justify-content:center; gap:8px; flex-wrap:wrap; padding:6px 0 4px; }
.flip-group{ display:flex; gap:6px; }
.flip-sep{ font-family:var(--mono); font-weight:700; font-size:clamp(28px,7vw,54px); color:var(--text-dim); padding:0 2px; align-self:center; }
.flip-unit{ perspective:320px; width:clamp(38px,9vw,64px); height:clamp(52px,13vw,88px); }
.flip-card{ position:relative; width:100%; height:100%; transform-style:preserve-3d; transition:transform .5s cubic-bezier(.45,0,.2,1); }
.flip-card.flip{ transform:rotateX(-180deg); }
.flip-face{
  position:absolute; inset:0; backface-visibility:hidden; border-radius:8px;
  background:var(--panel-2); border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-weight:700; color:var(--text-strong);
  font-size:clamp(24px,6vw,44px);
}
.flip-face.front{ transform:rotateX(0deg); }
.flip-face.back{ transform:rotateX(180deg); }
.flip-face::after{ content:''; position:absolute; left:0; right:0; top:50%; height:1px; background:rgba(0,0,0,.45); }
.flip-date{ text-align:center; color:var(--text-dim); font-size:13px; margin-top:16px; font-family:var(--mono); }
.ampm{
  align-self:center; font-family:var(--mono); font-weight:700; font-size:clamp(14px,3vw,18px);
  color:var(--text-strong); background:var(--panel-2); border:1px solid var(--line);
  border-radius:8px; padding:6px 10px; margin-left:6px;
}
.clock-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-top:26px; }
@media (max-width:640px){ .clock-grid{ grid-template-columns:repeat(2,1fr); } }
.clock-card{ background:var(--panel-2); border:1px solid var(--line); border-radius:12px; padding:18px; }
.clock-card .city{ font-size:13px; color:var(--text); font-weight:700; text-transform:uppercase; letter-spacing:.06em; margin-bottom:8px; }
.clock-card .time{ font-family:var(--mono); font-size:26px; font-weight:600; color:var(--text-strong); }
.clock-card .diff{ font-family:var(--mono); font-size:12px; color:var(--accent); margin-top:6px; }
.add-row{ margin-top:20px; display:flex; gap:10px; flex-wrap:wrap; align-items:center; }

/* ---- calculator ---- */
.aspect-916{ width:100%; max-width:360px; aspect-ratio:9/16; display:flex; flex-direction:column; overflow:hidden; padding:18px; }
.calc-display{ background:var(--panel-2); border:1px solid var(--line); border-radius:12px; padding:14px 16px; margin-bottom:12px; text-align:right; flex-shrink:0; }
.calc-expr{ font-family:var(--mono); font-size:13px; color:var(--text-dim); min-height:16px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.calc-result{ font-family:var(--mono); font-size:clamp(26px,6vw,32px); font-weight:700; color:var(--text-strong); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.calc-sci-row{ display:flex; gap:6px; overflow-x:auto; padding-bottom:8px; margin-bottom:8px; flex-shrink:0; }
.calc-sci-row button{
  flex:0 0 auto; background:var(--panel-3); border:1px solid var(--line); color:var(--text);
  font-family:var(--mono); font-size:12px; font-weight:600; padding:8px 10px; border-radius:8px; cursor:pointer;
}
.calc-sci-row button:hover{ border-color:var(--accent); color:var(--text-strong); }
.calc-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; flex:1; min-height:0; }
.calc-grid button{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text-strong);
  font-family:var(--sans); font-weight:700; font-size:clamp(15px,3.6vw,19px);
  border-radius:10px; cursor:pointer; transition:filter .12s ease, transform .05s ease;
}
.calc-grid button:active{ transform:scale(0.95); }
.calc-grid button.op{ background:var(--accent); color:var(--accent-ink); border-color:var(--accent); }
.calc-grid button.op:hover{ filter:brightness(1.08); }
.calc-grid button.fn{ color:var(--text); }

/* ---- converter ---- */
.subtabs{ display:flex; gap:6px; margin-bottom:14px; flex-wrap:wrap; flex-shrink:0; }
.subtab{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text);
  font-family:var(--sans); font-size:12px; font-weight:600; padding:7px 11px;
  border-radius:16px; cursor:pointer;
}
.subtab.active{ color:var(--accent-ink); background:var(--accent); border-color:var(--accent); }
.conv-col{ display:flex; flex-direction:column; gap:14px; }
.swap-btn{
  align-self:center; background:var(--panel-2); border:1px solid var(--line); color:var(--accent);
  width:36px; height:36px; border-radius:50%; cursor:pointer; font-size:15px;
}
.conv-out{ margin-top:14px; font-family:var(--mono); font-size:clamp(20px,5vw,26px); font-weight:700; color:var(--text-strong); }
.conv-out .u{ color:var(--text-dim); font-size:13px; font-weight:400; margin-left:6px; }
.note{ margin-top:10px; font-size:11.5px; color:var(--text); line-height:1.4; }

/* ---- FAQ ---- */
.faq{ display:flex; flex-direction:column; gap:14px; }
.faq-item{ background:var(--panel); border:1px solid var(--line); border-radius:12px; padding:18px 22px; }
.faq-item h3, .faq-item h2{ color:var(--text-strong); font-size:15px; margin:0 0 8px; }
.faq-item p{ color:var(--text); font-size:14px; line-height:1.6; margin:0; }

/* ---- UPI support ---- */
.upi-support{ display:flex; flex-direction:column; align-items:center; gap:10px; margin-bottom:14px; }
.upi-qr{ width:220px; border-radius:10px; overflow:hidden; border:1px solid var(--line); }
.upi-qr img{ display:block; width:100%; height:auto; }
.coffee-btn{
  display:inline-flex; align-items:center; gap:8px; background:var(--panel-2);
  border:1px solid var(--line); color:var(--text-strong); font-family:var(--sans);
  font-weight:700; font-size:13px; padding:9px 16px; border-radius:20px;
  text-decoration:none; margin-bottom:14px;
}
.coffee-btn:hover{ border-color:var(--accent); }
.upi-id-copy{
  background:var(--panel-2); border:1px solid var(--line); color:var(--text-strong);
  font-family:var(--mono); font-size:12.5px; padding:8px 12px; border-radius:8px;
  cursor:pointer; display:inline-flex; align-items:center; gap:8px;
}
.upi-id-copy:hover{ border-color:var(--accent); }
.upi-hint{ font-size:11px; color:var(--text-dim); max-width:280px; text-align:center; }

/* ---- footer ---- */
footer{ border-top:1px solid var(--line); padding:26px 22px; text-align:center;
  font-size:12px; color:var(--text-dim); font-family:var(--mono); }
.footer-links{ display:flex; justify-content:center; gap:16px; flex-wrap:wrap; margin-bottom:12px; }
.footer-links a{ color:var(--text); text-decoration:none; }
.footer-links a:hover{ color:var(--text-strong); text-decoration:underline; }

/* ---- simple content pages (About / FAQ / Privacy / Terms) ---- */
.page-wrap{ max-width:720px; margin:0 auto; padding:40px 22px 70px; width:100%; flex:1; }
.page-wrap h2{ color:var(--text-strong); font-size:17px; margin:30px 0 10px; }
.page-wrap p{ color:var(--text); font-size:15px; line-height:1.7; margin-bottom:16px; }
.updated{ color:var(--text-dim); font-size:13px; font-family:var(--mono); margin-bottom:30px; }
.back{ display:inline-block; margin-top:26px; color:var(--text-dim); font-family:var(--mono); font-size:13px; text-decoration:none; }
.back:hover{ color:var(--text-strong); }