/* =========================================================
   WebUtilPro — Design System
   Concept: a technical instrument panel for everyday tools.
   Signature: monospace "readout" strips that report live,
   local-only activity (nothing ever leaves the browser).
   ========================================================= */

:root{
  --paper:#F6F5F0;
  --panel:#FFFFFF;
  --panel-sunken:#EFEEE6;
  --ink:#1C2B28;
  --ink-soft:#57645F;
  --ink-faint:#8C948E;
  --line:#E1DFD2;
  --line-strong:#CBC7B6;
  --blue:#0E6B5C;
  --blue-deep:#0A4F44;
  --blue-tint:#E5F1EC;
  --amber:#C07C26;
  --amber-tint:#FAEEDC;
  --green:#3C8F5C;
  --green-tint:#E9F5EC;
  --red:#B1503A;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(18,26,43,0.05);
  --shadow-md: 0 6px 20px rgba(18,26,43,0.07);
  --shadow-lg: 0 18px 46px rgba(18,26,43,0.12);
  --maxw: 1120px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:var(--blue); text-decoration:none; }
a:hover{ text-decoration:underline; }
h1,h2,h3,h4{ font-family:var(--sans); color:var(--ink); line-height:1.15; margin:0 0 .5em; letter-spacing:-0.01em; }
p{ margin:0 0 1em; color:var(--ink-soft); }
code, .mono{ font-family:var(--mono); }
:focus-visible{ outline:2px solid var(--blue); outline-offset:2px; border-radius:4px; }

.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(245,246,243,0.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{ display:flex; align-items:center; justify-content:space-between; height:64px; }
.logo{
  font-family:var(--mono); font-weight:600; font-size:1.05rem; color:var(--ink);
  white-space:nowrap; letter-spacing:-0.01em;
}
.logo .accent{ color:var(--blue); }
.logo .cursor{ color:var(--amber); animation:blink 1.1s steps(1) infinite; }
@keyframes blink{ 50%{ opacity:0; } }

.nav-links{ display:flex; align-items:center; gap:28px; list-style:none; margin:0; padding:0; }
.nav-links a{
  color:var(--ink-soft); font-size:.92rem; font-weight:550;
  padding:6px 2px; border-bottom:2px solid transparent;
}
.nav-links a:hover, .nav-links a.active{ color:var(--ink); text-decoration:none; border-color:var(--amber); }
.nav-toggle{ display:none; background:none; border:1px solid var(--line); border-radius:8px; padding:8px 10px; cursor:pointer; }
.nav-toggle span{ display:block; width:18px; height:2px; background:var(--ink); margin:4px 0; }

@media (max-width:760px){
  .nav-toggle{ display:block; }
  .nav-links{
    position:absolute; top:64px; left:0; right:0; background:var(--panel);
    flex-direction:column; align-items:flex-start; gap:0; border-bottom:1px solid var(--line);
    max-height:0; overflow:hidden; transition:max-height .25s ease;
  }
  .nav-links.open{ max-height:320px; }
  .nav-links li{ width:100%; }
  .nav-links a{ display:block; padding:14px 24px; border-bottom:1px solid var(--line); border-left:2px solid transparent; }
  .nav-links a:hover, .nav-links a.active{ border-left-color:var(--amber); border-bottom-color:var(--line); background:var(--paper); }
}

/* ---------- Readout strip (signature element) ---------- */
.readout{
  font-family:var(--mono); font-size:.8rem; color:var(--ink-soft);
  background:var(--panel-sunken); border:1px solid var(--line); border-radius:999px;
  display:inline-flex; align-items:center; gap:10px; padding:7px 16px;
}
.readout .dot{ width:7px; height:7px; border-radius:50%; background:var(--green); box-shadow:0 0 0 3px var(--green-tint); flex:none; }
.readout b{ color:var(--ink); font-weight:600; }
.readout-row{ display:flex; justify-content:center; margin:22px 0 8px; }
@media (max-width:640px){ .readout{ flex-wrap:wrap; text-align:center; justify-content:center; } }

/* ---------- Hero ---------- */
.hero{ padding:56px 0 8px; text-align:center; }
.hero .eyebrow{
  font-family:var(--mono); font-size:.78rem; color:var(--blue-deep); background:var(--blue-tint);
  display:inline-block; padding:4px 10px; border-radius:6px; margin-bottom:14px; letter-spacing:.02em;
}
.hero h1{ font-size:2.5rem; max-width:820px; margin-left:auto; margin-right:auto; }
.hero p.lede{ font-size:1.1rem; max-width:620px; margin-left:auto; margin-right:auto; }
.page-hero{ padding:44px 0 4px; border-bottom:1px solid var(--line); margin-bottom:36px; text-align:center; }
.page-hero h1{ font-size:2rem; }
.page-hero p.lede{ font-size:1.02rem; max-width:620px; margin-left:auto; margin-right:auto; }

/* ---------- Panels / cards ---------- */
.panel{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm); padding:28px;
}
.panel-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:4px; flex-wrap:wrap; }
.panel-head h2{ font-size:1.3rem; }
.panel-sub{ color:var(--ink-faint); font-size:.88rem; margin-bottom:20px; }

.field-row{ display:flex; justify-content:space-between; align-items:baseline; margin-bottom:6px; }
.field-label{ font-weight:600; font-size:.88rem; }
.field-value{ font-family:var(--mono); font-weight:600; color:var(--blue-deep); }

input[type=range]{ width:100%; accent-color:var(--blue); }
input[type=text], input[type=number], input[type=search], textarea, select{
  width:100%; font-family:var(--sans); font-size:.95rem; color:var(--ink);
  background:var(--paper); border:1px solid var(--line); border-radius:8px; padding:11px 13px;
}
textarea{ font-family:var(--mono); font-size:.88rem; resize:vertical; }
input:focus, textarea:focus, select:focus{ background:var(--panel); border-color:var(--blue); }

.checks{ display:grid; grid-template-columns:1fr 1fr; gap:10px 18px; margin:18px 0; }
.check{ display:flex; align-items:center; gap:8px; font-size:.92rem; font-weight:520; }
.check input{ width:17px; height:17px; accent-color:var(--blue); }

.output-box{
  position:relative; background:var(--panel-sunken); border:1px solid var(--line); border-radius:10px;
  padding:16px 52px 16px 18px; margin-bottom:18px; font-family:var(--mono); font-size:1.15rem;
  letter-spacing:.3px; word-break:break-all; min-height:1.4em;
}
.output-box.small{ font-size:.95rem; }
.icon-btn{
  position:absolute; top:9px; right:9px; background:var(--panel); border:1px solid var(--line);
  border-radius:7px; width:34px; height:34px; cursor:pointer; font-size:1rem; color:var(--ink-soft);
}
.icon-btn:hover{ border-color:var(--blue); color:var(--blue); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--sans); font-weight:650; font-size:.95rem; cursor:pointer;
  border-radius:9px; padding:12px 20px; border:1px solid var(--line); background:var(--panel); color:var(--ink);
  transition:transform .05s ease;
}
.btn:hover{ text-decoration:none; border-color:var(--line-strong); }
.btn:active{ transform:scale(.98); }
.btn-primary{ background:var(--ink); border-color:var(--ink); color:#fff; width:100%; }
.btn-primary:hover{ background:var(--blue-deep); border-color:var(--blue-deep); }
.btn-block{ width:100%; }
.btn-row{ display:flex; gap:10px; flex-wrap:wrap; }
.btn-row .btn{ flex:1; }

.meta-strip{ display:flex; gap:18px; flex-wrap:wrap; margin-top:16px; font-family:var(--mono); font-size:.82rem; color:var(--ink-faint); }
.meta-strip b{ color:var(--ink); }

/* ---------- Grids ---------- */
.section{ padding:44px 0; }
.section-title{ font-size:1.5rem; margin-bottom:4px; text-align:center; }
.section-sub{ color:var(--ink-faint); margin-bottom:26px; text-align:center; }

.tools-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:16px; }
.tool-card{
  display:block; background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-lg);
  padding:26px 20px; box-shadow:var(--shadow-sm); color:inherit; text-align:center;
}
.tool-card:hover{ text-decoration:none; border-color:var(--blue); box-shadow:var(--shadow-md); transform:translateY(-2px); }
.tool-card{ transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease; }
.tool-card .cmd{ font-family:var(--mono); font-size:.72rem; color:var(--blue-deep); background:var(--blue-tint); display:inline-block; padding:2px 8px; border-radius:5px; margin-bottom:10px; }
.tool-card .ic{ font-size:1.6rem; margin-bottom:2px; }
.tool-card h3{ font-size:1.05rem; margin-bottom:4px; }
.tool-card p{ font-size:.87rem; margin:0; }

.features{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.feature-card{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-lg); padding:20px 16px; text-align:center; }
.feature-card .ic{ font-size:1.4rem; margin-bottom:8px; }
.feature-card h3{ font-size:.95rem; margin-bottom:4px; }
.feature-card p{ font-size:.83rem; margin:0; }
@media (max-width:860px){ .features{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .features{ grid-template-columns:1fr; } .hero h1{ font-size:1.9rem; } }

/* ---------- Ads ---------- */
.ad-slot{
  width:100%; min-height:90px; margin:34px 0; background:var(--panel-sunken);
  border:1px dashed var(--line-strong); border-radius:10px; display:flex; align-items:center;
  justify-content:center; color:var(--ink-faint); font-size:.78rem; font-family:var(--mono);
}

/* ---------- Blog ---------- */
.post-card{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-lg); padding:26px; margin-bottom:18px; box-shadow:var(--shadow-sm); }
.post-card .date{ font-family:var(--mono); font-size:.76rem; color:var(--ink-faint); margin-bottom:8px; }
.post-card h2{ font-size:1.3rem; margin-bottom:8px; }
.post-card h2 a{ color:var(--ink); }
.post-card h2 a:hover{ color:var(--blue); text-decoration:none; }
article.post{ max-width:720px; margin:0 auto; }
article.post h1{ font-size:2rem; }
article.post .date{ font-family:var(--mono); font-size:.8rem; color:var(--ink-faint); margin-bottom:26px; }
article.post p{ color:var(--ink); font-size:1.03rem; }
.back-link{ display:inline-block; margin-bottom:22px; font-family:var(--mono); font-size:.85rem; }

/* ---------- Legal / simple pages ---------- */
.prose{ max-width:760px; }
.prose h2{ margin-top:1.6em; font-size:1.25rem; }
.prose ul{ color:var(--ink-soft); }
.prose li{ margin-bottom:.4em; }

/* ---------- Footer ---------- */
.site-footer{ border-top:1px solid var(--line); margin-top:60px; padding:40px 0 30px; }
.footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr; gap:24px; margin-bottom:28px; }
.footer-col h4{ font-size:.82rem; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-faint); margin-bottom:14px; }
.footer-col a{
  display:block; color:var(--ink-soft); font-size:.92rem; font-weight:500;
  padding:5px 0; border-bottom:1px solid transparent;
}
.footer-col a:hover{ color:var(--blue-deep); text-decoration:none; }
.footer-brand .logo{ margin-bottom:10px; }
.footer-brand p{ font-size:.86rem; max-width:280px; }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; border-top:1px solid var(--line); padding-top:20px; font-size:.82rem; color:var(--ink-faint); }
@media (max-width:760px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:480px){ .footer-grid{ grid-template-columns:1fr; } }

/* ---------- Contact / about extras ---------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; align-items:start; }
@media (max-width:760px){ .contact-grid{ grid-template-columns:1fr; } }
.info-card{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius-lg); padding:22px; margin-bottom:14px; }
.info-card h3{ font-size:.95rem; margin-bottom:4px; }
.info-card p{ font-size:.88rem; margin:0; }

/* ---------- QR canvas ---------- */
#qrCanvasWrap{ display:flex; justify-content:center; padding:14px; background:var(--panel-sunken); border:1px solid var(--line); border-radius:10px; margin-bottom:18px; }

/* ---------- Color picker swatch ---------- */
.swatch{ width:100%; height:130px; border-radius:12px; border:1px solid var(--line); margin-bottom:18px; }
.color-vals{ display:grid; grid-template-columns:1fr; gap:10px; }
.color-val-row{ display:flex; align-items:center; gap:10px; }
.color-val-row .field-label{ width:52px; flex:none; }
.color-val-row input{ font-family:var(--mono); }
.color-val-row button{ flex:none; }