/* ==========================================================================
   OnlineFreeToolBox — Shared Design System
   One stylesheet, loaded by every page, so the whole site stays consistent
   and browsers only have to download/parse it once (cached across pages).
   Page-specific tool UI (calculators, editors, canvases) stays inline in
   each page's own <style> block — only the shared vocabulary lives here.
   ========================================================================== */

:root{
  --paper:#FFFFFF;
  --card:#FFFFFF;
  --surface:#F6F7F9;
  --ink:#1B2A4A;
  --ink-soft:#4A5877;
  --mustard:#C9A227;
  --teal:#2F6F5E;
  --teal-dark:#255c4e;
  --teal-tint:#EAF3F0;
  --border:#EAEAEF;
  --readout-bg:#1B2A4A;
  --readout-fg:#F0E9C9;
  --shadow-sm:0 1px 3px rgba(27,42,74,0.07), 0 1px 2px rgba(27,42,74,0.05);
  --shadow-md:0 6px 16px rgba(27,42,74,0.10), 0 2px 6px rgba(27,42,74,0.06);
  --shadow-lg:0 16px 32px rgba(27,42,74,0.14), 0 6px 12px rgba(27,42,74,0.08);
}

*{box-sizing:border-box;}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Source Sans 3', sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

::selection{background:var(--teal); color:#fff;}

/* ---------- Site navigation ---------- */
.site-nav{
  max-width:820px; margin:0 auto; padding:16px 20px;
  display:flex; align-items:center; justify-content:space-between;
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,0.85);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.site-logo{
  font-family:'Fraunces', serif; font-weight:700; font-size:19px;
  color:var(--ink); text-decoration:none; transition:opacity 0.15s ease;
  display:flex; align-items:center;
}
.site-logo:hover{opacity:0.75;}
.site-logo span{color:var(--teal);}
.logo-img{height:32px; width:auto; display:block;}
.nav-home{
  font-family:'Source Sans 3', sans-serif; font-size:13px; font-weight:600;
  color:var(--teal); text-decoration:none;
  background:var(--teal-tint); border:1px solid transparent;
  padding:9px 16px; border-radius:20px; white-space:nowrap;
  display:inline-flex; align-items:center; gap:6px;
  transition:background 0.18s ease, color 0.18s ease, transform 0.12s ease, box-shadow 0.18s ease;
}
.nav-home:hover{background:var(--teal); color:#fff; box-shadow:var(--shadow-md); transform:translateY(-1px);}
.nav-home:active{transform:translateY(0); box-shadow:var(--shadow-sm);}
.nav-links{display:flex; gap:18px;}
.nav-links a{
  font-family:'JetBrains Mono', monospace; font-size:12px; letter-spacing:0.06em; text-transform:uppercase;
  color:var(--ink-soft); text-decoration:none; font-weight:700; transition:color 0.15s ease;
}
.nav-links a:hover{color:var(--teal);}

/* ---------- Page header ---------- */
header{max-width:820px; margin:0 auto; padding:40px 20px 12px;}
.eyebrow{
  font-family:'JetBrains Mono', monospace; font-size:12px; letter-spacing:0.14em; text-transform:uppercase;
  color:var(--teal); font-weight:700; margin:0 0 12px;
  display:inline-flex; align-items:center; gap:8px;
}
.eyebrow::before{content:''; width:16px; height:2px; background:var(--mustard); border-radius:2px;}
h1{
  font-family:'Fraunces', serif; font-weight:600; font-size:clamp(28px,5vw,42px);
  margin:0 0 10px; letter-spacing:-0.015em; line-height:1.08; color:var(--ink);
}
.sub{color:var(--ink-soft); font-size:16.5px; max-width:60ch; margin:0; line-height:1.6;}
.updated{color:var(--ink-soft); font-size:13px; font-family:'JetBrains Mono', monospace;}

/* ---------- Layout ---------- */
main{max-width:760px; margin:0 auto; padding:28px 20px 0;}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:14px; padding:22px;
  margin-bottom:16px; box-shadow:var(--shadow-md); transition:box-shadow 0.2s ease;
}

article{max-width:760px; margin:48px auto 64px; padding:0 20px;}
article h2{
  font-family:'Fraunces', serif; font-size:22px; font-weight:600; margin:32px 0 12px; color:var(--ink);
}
article p{color:var(--ink-soft); font-size:15.5px; line-height:1.7;}
article ul{color:var(--ink-soft); font-size:15.5px; padding-left:20px; line-height:1.7;}
article li{margin-bottom:6px;}
article a{color:var(--teal); text-underline-offset:2px;}

.step-label{
  font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--ink-soft); font-weight:700; margin:0 0 12px;
}
.hint{font-size:13px; color:var(--ink-soft); margin-top:10px; line-height:1.5;}

/* ---------- Form elements ---------- */
.row{display:flex; gap:12px; flex-wrap:wrap;}
.form-row{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:16px; flex-wrap:wrap;}
.field{display:flex; flex-direction:column; gap:6px; flex:1; min-width:150px; margin-bottom:14px;}
.field-row{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-top:16px; flex-wrap:wrap;}

label{
  font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--ink-soft);
}

input[type="text"], input[type="number"], input[type="date"], input[type="datetime-local"], select{
  border:1px solid var(--border); border-radius:8px; padding:11px 14px;
  font-family:'Source Sans 3', sans-serif; font-size:15px; color:var(--ink); background:var(--surface); width:100%;
  transition:border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus{
  outline:none; border-color:var(--teal); background:#fff;
  box-shadow:0 0 0 3px rgba(47,111,94,0.15);
}

input[type="range"]{width:150px; accent-color:var(--teal);}
input[type="checkbox"]{width:18px; height:18px; accent-color:var(--teal);}

/* ---------- Buttons ---------- */
.actions{display:flex; gap:10px; margin-top:16px; flex-wrap:wrap;}
button.btn{
  font-family:'Source Sans 3', sans-serif; font-weight:600; font-size:14px;
  padding:11px 18px; border-radius:8px; border:1px solid var(--teal); background:var(--teal); color:#fff; cursor:pointer;
  min-height:44px; box-shadow:var(--shadow-sm);
  transition:background 0.15s ease, border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}
button.btn:hover{background:var(--teal-dark); border-color:var(--teal-dark); box-shadow:var(--shadow-md);}
button.btn:active{transform:translateY(1px); box-shadow:var(--shadow-sm);}
button.btn.secondary{background:var(--card); color:var(--ink); border-color:var(--border);}
button.btn.secondary:hover{border-color:var(--teal); color:var(--teal); background:#fff; box-shadow:var(--shadow-md);}
button.btn:disabled{opacity:0.5; cursor:not-allowed; transform:none; box-shadow:none;}
button:focus-visible{outline:2px solid var(--teal); outline-offset:2px;}

/* ---------- Upload dropzone ---------- */
.dropzone{
  border:2px dashed var(--border); border-radius:12px; padding:38px 20px; text-align:center;
  cursor:pointer; color:var(--ink-soft); font-size:15px; background:rgba(47,111,94,0.02);
  transition:border-color 0.15s ease, background 0.15s ease, transform 0.1s ease;
}
.dropzone:hover{border-color:var(--teal); color:var(--teal); background:rgba(47,111,94,0.05);}
.dropzone.drag{border-color:var(--teal); color:var(--teal); background:rgba(47,111,94,0.08); transform:scale(1.005);}
.dropzone strong{color:var(--ink); display:block; margin-bottom:6px; font-size:16px;}
input[type="file"]{display:none;}

/* ---------- Tabs ---------- */
.tabs{display:flex; gap:8px; margin-bottom:16px; flex-wrap:wrap;}
.tab{
  font-family:'JetBrains Mono', monospace; font-size:12px; letter-spacing:0.05em; text-transform:uppercase;
  padding:10px 16px; border-radius:20px; border:1px solid var(--border); background:var(--card); color:var(--ink-soft);
  cursor:pointer; font-weight:600; white-space:nowrap; flex-shrink:0; min-height:40px;
  transition:background 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.tab:hover{border-color:var(--teal); color:var(--teal);}
.tab.active{background:var(--teal); border-color:var(--teal); color:#fff; box-shadow:var(--shadow-sm);}
.tab.active:hover{background:var(--teal-dark); border-color:var(--teal-dark); color:#fff;}
.panel{display:none;}
.panel.active{display:block; animation:fadeIn 0.2s ease;}

@keyframes fadeIn{ from{opacity:0;} to{opacity:1;} }

/* ---------- Status / progress ---------- */
.status-line{font-size:14px; color:var(--ink-soft); margin-top:12px; display:none;}
.status-line.show{display:block;}
.error{color:#B3453D; font-size:14px; margin-top:12px; display:none;}
.error.show{display:block;}
.progress-bar{height:6px; background:var(--border); border-radius:3px; overflow:hidden; margin-top:8px; display:none;}
.progress-bar.show{display:block;}
.progress-fill{height:100%; background:var(--teal); width:0%; transition:width 0.2s ease;}

/* ---------- Readout / results display ---------- */
.readout{
  margin-top:16px; background:var(--readout-bg); border-radius:10px; padding:18px 20px;
  display:grid; grid-template-columns:repeat(auto-fit, minmax(120px,1fr)); gap:14px 20px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.06), var(--shadow-md);
}
.readout.show{display:grid;}
.stat-label{
  font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:#AFC2B8; margin:0 0 4px;
}
.stat-value{
  font-family:'JetBrains Mono', monospace; font-size:20px; font-weight:700; color:var(--readout-fg);
  margin:0; font-variant-numeric:tabular-nums;
}
.headline-label{
  font-family:'JetBrains Mono', monospace; font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:#AFC2B8; margin:0 0 4px;
}
.headline{
  font-family:'JetBrains Mono', monospace; font-weight:700; color:var(--readout-fg);
  margin:0 0 16px; font-variant-numeric:tabular-nums;
}

/* ---------- FAQ ---------- */
.faq-item{margin-bottom:20px; padding-bottom:20px; border-bottom:1px solid var(--border);}
.faq-item:last-child{border-bottom:none; margin-bottom:0; padding-bottom:0;}
.faq-item h3{font-family:'Source Sans 3', sans-serif; font-size:16px; font-weight:600; color:var(--ink); margin:0 0 6px;}

/* ---------- Footer ---------- */
.footer-links{display:flex; gap:16px; justify-content:center; flex-wrap:wrap; margin-bottom:10px;}
.footer-links a{color:var(--ink-soft); text-decoration:none; font-size:13px; transition:color 0.15s ease;}
.footer-links a:hover{color:var(--teal); text-decoration:underline;}
footer{text-align:center; padding:28px 20px 44px; color:var(--ink-soft); font-size:13px; border-top:1px solid var(--border); margin-top:24px;}

/* ---------- Homepage tool grid ---------- */
.category-label{
  font-family:'JetBrains Mono', monospace; font-size:12px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--mustard); font-weight:700; margin:40px 0 16px;
  display:flex; align-items:center; gap:10px;
}
.category-label::after{content:''; flex:1; height:1px; background:var(--border);}
.category-label:first-child{margin-top:0;}
.grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(250px, 1fr)); gap:16px;}
a.tool-card{
  display:block; background:var(--card); border:1px solid var(--border); border-radius:14px;
  padding:20px; text-decoration:none; color:var(--ink); box-shadow:var(--shadow-md);
  transition:border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
a.tool-card:hover{border-color:var(--teal); transform:translateY(-4px); box-shadow:var(--shadow-lg);}
a.tool-card:focus-visible{outline:2px solid var(--teal); outline-offset:2px;}
.tool-card h2{font-family:'Fraunces', serif; font-weight:600; font-size:18px; margin:0 0 6px;}
.tool-card p{font-size:13.5px; color:var(--ink-soft); margin:0; line-height:1.5;}

/* ==========================================================================
   Responsive breakpoints
   ========================================================================== */
@media (max-width: 600px){
  .site-nav{padding:14px 16px;}
  header{padding:28px 16px 10px;}
  main{padding:20px 16px 0;}
  article{padding:0 16px; margin:36px auto 52px;}
  .card{padding:16px;}
  .actions{flex-direction:column;}
  .actions button.btn{width:100%;}
  .grid{grid-template-columns:1fr;}
  .tab{padding:8px 12px; font-size:11px;}
  .readout{grid-template-columns:repeat(2, 1fr);}
  h1{line-height:1.15;}
  a.tool-card:hover{transform:none;}
}

@media (max-width: 380px){
  .readout{grid-template-columns:1fr;}
}

@media (prefers-reduced-motion: reduce){
  *{transition-duration:0.01ms !important; animation-duration:0.01ms !important;}
}