/* Toolstack — studio-grade visual identity
   Warm graphite surface, deep teal primary accent, amber + rose secondary accents */

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

:root{
  --paper:#FAFAF8;
  --paper-raised:#FFFFFF;
  --ink:#1D211F;
  --ink-soft:#575D5A;
  --ink-faint:#8B918D;
  --line:#E5E3DD;
  --line-strong:#D2CFC5;

  --accent:#1B6B63;        /* deep teal — primary */
  --accent-deep:#134F49;
  --accent-ink:#FFFFFF;
  --accent-2:#B8863D;      /* warm amber — secondary */
  --accent-3:#8B5A6B;      /* dusty rose — tertiary */

  --success-soft:#E4F3F0;
  --danger:#B3402E;

  --radius:16px;
  --shadow: 0 8px 24px rgba(29,33,31,.08);
  --mono: 'IBM Plex Mono', monospace;
  --display: 'Sora', sans-serif;
  --body: 'Inter', sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent); text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}

.wrap{max-width:1080px; margin:0 auto; padding:0 24px;}

/* ---------- header ---------- */
header.site{
  border-bottom:1px solid var(--line);
  background:var(--paper);
  position:sticky; top:0; z-index:50;
}
.nav-row{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 0; gap:24px; flex-wrap:wrap;
}
.logo{
  font-family:var(--display); font-weight:800; font-size:20px;
  letter-spacing:-0.01em; color:var(--ink); display:flex; align-items:center; gap:8px;
}
.logo .dot{
  width:9px; height:9px; border-radius:3px; display:inline-block;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
}
nav.categories{display:flex; gap:22px; flex-wrap:wrap;}
nav.categories a{
  font-family:var(--body); font-weight:600; font-size:13.5px;
  color:var(--ink-soft);
}
nav.categories a:hover{color:var(--accent); text-decoration:none;}
.search-box{position:relative;}
.search-box input{
  width:200px; padding:8px 12px 8px 32px; border:1px solid var(--line-strong);
  border-radius:999px; font-family:var(--body); font-size:13px; background:var(--paper-raised);
}
.search-box input:focus{outline:2px solid var(--accent); outline-offset:1px;}
.search-box svg{position:absolute; left:11px; top:50%; transform:translateY(-50%); width:14px; height:14px; opacity:.5;}

/* ---------- catalog tag (signature pill) ---------- */
.catalog-tag{
  font-family:var(--body); font-size:12.5px; font-weight:700; letter-spacing:.01em;
  color:var(--accent-deep); background:var(--success-soft); display:inline-flex; align-items:center; gap:6px;
  padding:6px 14px; border-radius:999px; margin-bottom:18px; border:1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.catalog-tag::before{content:''; width:6px; height:6px; border-radius:50%; background:var(--accent); display:inline-block;}

/* ---------- hero ---------- */
.hero{
  padding:56px 24px 44px; text-align:center; position:relative;
  border:1px solid var(--line); border-radius:28px; overflow:hidden;
  background:var(--paper-raised); margin:20px 0 0;
}
.hero::before{
  content:''; position:absolute; top:-40px; left:50%; transform:translateX(-50%);
  width:640px; height:280px; max-width:90vw;
  background:radial-gradient(ellipse at center, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 70%);
  pointer-events:none; z-index:0;
}
.hero > *{position:relative; z-index:1;}
.hero h1{
  font-family:var(--display); font-weight:800; font-size:44px; line-height:1.12;
  margin:0 0 14px; letter-spacing:-0.02em;
  background:linear-gradient(90deg,#2FE6B0 0%,#4FC3F7 50%,#8C8CFF 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent; -webkit-text-fill-color:transparent;
}
.hero p.sub{color:var(--ink-soft); font-size:16.5px; margin:0 0 30px; max-width:520px; margin-left:auto; margin-right:auto;}
.hero-search{position:relative; max-width:480px; margin:0 auto;}
.hero-search input{
  width:100%; padding:15px 16px 15px 46px; font-size:15px; border:1px solid var(--line-strong);
  border-radius:14px; background:var(--paper-raised); font-family:var(--body);
  box-shadow:var(--shadow);
}
.hero-search input:focus{outline:2px solid var(--accent); outline-offset:1px;}
.hero-search svg{position:absolute; left:17px; top:50%; transform:translateY(-50%); width:18px; height:18px; opacity:.45;}

/* ---------- section / category rows ---------- */
.section-label{
  font-family:var(--display); font-weight:700; font-size:14px;
  margin:44px 0 14px; display:flex; align-items:center; gap:12px;
  background:linear-gradient(90deg,#2FE6B0 0%,#4FC3F7 50%,#8C8CFF 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent; -webkit-text-fill-color:transparent;
}
.section-label::after{content:''; flex:1; height:1px; background:var(--line); -webkit-background-clip:border-box; background-clip:border-box; -webkit-text-fill-color:initial;}

.tool-grid{
  display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px;
}
@media(max-width:820px){ .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
@media(max-width:480px){ .tool-grid{grid-template-columns:1fr;} }

.tool-card{
  display:block; background:var(--paper-raised); border:1px solid var(--line);
  border-radius:var(--radius); padding:18px;
  transition:border-color .18s, transform .18s, box-shadow .18s;
}
.tool-card:hover{
  border-color:color-mix(in srgb, var(--accent) 40%, var(--line));
  text-decoration:none; transform:translateY(-3px);
  box-shadow:0 12px 24px color-mix(in srgb, var(--accent) 12%, transparent);
}
.tool-card .num{
  width:38px; height:38px; padding:0; margin-bottom:4px;
  border-radius:11px; display:flex; align-items:center; justify-content:center;
  font-size:0; /* visually hide the "TOOL" label text; icon comes from ::before */
  color:var(--icon-teal); background:color-mix(in srgb, var(--icon-teal) 15%, transparent);
}
.tool-card .num::before{
  content:"Σ"; font-family:var(--display); font-weight:700; font-size:18px; line-height:1;
}
.tool-card h3{font-family:var(--display); font-weight:700; font-size:15.5px; margin:10px 0 4px; color:var(--ink);}
.tool-card p{font-size:13px; color:var(--ink-soft); margin:0;}

/* category icon color + glyph, grouped in pairs: teal / blue / purple */
:root{ --icon-teal:#2FE6B0; --icon-blue:#4FC3F7; --icon-purple:#9B8CFF; }
.tool-grid[data-cat="calc"] .tool-card .num,
.tool-grid[data-cat="pdf"]  .tool-card .num{color:var(--icon-teal); background:color-mix(in srgb, var(--icon-teal) 15%, transparent);}
.tool-grid[data-cat="image"] .tool-card .num,
.tool-grid[data-cat="text"]  .tool-card .num{color:var(--icon-blue); background:color-mix(in srgb, var(--icon-blue) 15%, transparent);}
.tool-grid[data-cat="dev"]  .tool-card .num,
.tool-grid[data-cat="conv"] .tool-card .num{color:var(--icon-purple); background:color-mix(in srgb, var(--icon-purple) 15%, transparent);}

.tool-grid[data-cat="calc"]  .tool-card .num::before{content:"\03A3";}      /* Σ */
.tool-grid[data-cat="pdf"]   .tool-card .num::before{content:"\25A4";}      /* document/lines */
.tool-grid[data-cat="image"] .tool-card .num::before{content:"\25A6";}      /* grid */
.tool-grid[data-cat="text"]  .tool-card .num::before{content:"\00B6";}      /* pilcrow */
.tool-grid[data-cat="dev"]   .tool-card .num::before{content:"{ }"; font-size:14px;}
.tool-grid[data-cat="conv"]  .tool-card .num::before{content:"\21C4";}      /* left-right arrows */

.tool-grid[data-cat="image"] .tool-card:hover,
.tool-grid[data-cat="text"]  .tool-card:hover{border-color:color-mix(in srgb, var(--icon-blue) 40%, var(--line)); box-shadow:0 12px 24px color-mix(in srgb, var(--icon-blue) 14%, transparent);}
.tool-grid[data-cat="dev"]   .tool-card:hover,
.tool-grid[data-cat="conv"]  .tool-card:hover{border-color:color-mix(in srgb, var(--icon-purple) 40%, var(--line)); box-shadow:0 12px 24px color-mix(in srgb, var(--icon-purple) 14%, transparent);}

/* ---------- missing-tool CTA card ---------- */
.missing-tool-card{
  display:flex; align-items:center; gap:16px;
  border:1.5px dashed var(--line-strong); border-radius:var(--radius);
  padding:20px 22px; margin:30px 0 10px; text-decoration:none;
  background:linear-gradient(135deg, color-mix(in srgb, var(--icon-teal) 10%, transparent), color-mix(in srgb, var(--icon-purple) 10%, transparent));
  transition:border-color .18s;
}
.missing-tool-card:hover{border-color:var(--accent); text-decoration:none;}
.missing-tool-card .mt-icon{
  width:40px; height:40px; border-radius:12px; flex:none;
  background:var(--paper); color:var(--icon-blue);
  display:flex; align-items:center; justify-content:center; font-size:20px; font-weight:700;
}
.missing-tool-card h3{margin:0 0 4px; font-family:var(--display); font-weight:700; font-size:15.5px; color:var(--ink);}
.missing-tool-card p{margin:0; font-size:13.5px; color:var(--ink-soft);}

/* ---------- footer ---------- */
footer.site{border-top:1px solid var(--line); margin-top:72px; padding:30px 0; }
.footer-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;}
.footer-row .links a{font-size:13px; color:var(--ink-soft); margin-right:18px; font-family:var(--mono); font-weight:500;}
.footer-row .copy{font-size:12px; color:var(--ink-faint); font-family:var(--mono);}

/* ---------- tool page ---------- */
.tool-page-head{padding:44px 0 8px;}
.tool-page-head h1{
  font-family:var(--display); font-weight:800; font-size:32px; margin:0 0 10px; letter-spacing:-0.01em;
  background:linear-gradient(90deg,#2FE6B0 0%,#4FC3F7 50%,#8C8CFF 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent; -webkit-text-fill-color:transparent; width:fit-content;
}
.tool-page-head p.lede{color:var(--ink-soft); font-size:16px; max-width:620px;}

.tool-panel{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:20px;
  padding:30px; margin:26px 0 38px; box-shadow:var(--shadow);
}
.tool-panel label{
  display:block; font-family:var(--body); font-size:12.5px; font-weight:600; text-transform:uppercase;
  letter-spacing:.03em; color:var(--ink-soft); margin:0 0 6px;
}
.tool-panel input[type=text], .tool-panel input[type=number], .tool-panel input[type=date],
.tool-panel textarea, .tool-panel select{
  width:100%; padding:11px 13px; border:1px solid var(--line-strong); border-radius:10px;
  font-family:var(--body); font-size:14px; background:var(--paper); color:var(--ink); margin-bottom:16px;
}
.tool-panel input::placeholder, .tool-panel textarea::placeholder{color:var(--ink-faint); opacity:1;}
.tool-panel select{color-scheme:light dark;}
.tool-panel input:focus, .tool-panel textarea:focus, .tool-panel select:focus{outline:2px solid var(--accent); outline-offset:1px;}
.tool-panel textarea{min-height:140px; font-family:var(--mono); font-size:13px; resize:vertical;}
.field-row{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px;}
@media(max-width:600px){.field-row{grid-template-columns:1fr;}}

.btn{
  font-family:var(--body); font-weight:700; font-size:14px; padding:12px 26px;
  background:linear-gradient(135deg, var(--accent), var(--accent-deep)); color:#fff; border:none;
  border-radius:999px; cursor:pointer; transition:transform .15s, box-shadow .15s;
  box-shadow:0 8px 20px color-mix(in srgb, var(--accent) 30%, transparent);
}
.btn:hover{transform:translateY(-1px); box-shadow:0 10px 24px color-mix(in srgb, var(--accent) 40%, transparent); opacity:1;}
.btn.secondary{background:transparent; color:var(--ink); border:1px solid var(--line-strong); box-shadow:none;}
.btn.secondary:hover{border-color:var(--accent); color:var(--accent); transform:none;}
.btn-row{display:flex; gap:10px; flex-wrap:wrap; margin-top:6px;}

.result-box{
  margin-top:22px; padding:18px 20px; background:var(--success-soft); border:1px solid var(--accent);
  border-radius:14px; font-family:var(--mono); font-size:14px; color:var(--accent-deep); word-break:break-word; white-space:pre-wrap;
}
.result-box.empty{display:none;}
.error-msg{color:var(--danger); font-size:13px; margin-top:-8px; margin-bottom:14px; font-family:var(--body); font-weight:500; display:none;}
.error-msg.show{display:block;}

.checkbox-row{display:flex; align-items:center; gap:8px; margin-bottom:10px; font-family:var(--body); font-size:14px; color:var(--ink);}
.checkbox-row input{width:auto; margin:0;}
.checkbox-row label{display:inline; text-transform:none; font-family:var(--body); font-size:14px; color:var(--ink); margin:0;}

.range-row{display:flex; align-items:center; gap:12px; margin-bottom:16px;}
.range-row input[type=range]{flex:1; accent-color:var(--accent);}
.range-row .val{font-family:var(--mono); font-size:13px; min-width:44px; text-align:right;}

/* ---------- article / seo content ---------- */
.article{max-width:680px; margin:0 auto 40px;}
.article h2{font-family:var(--display); font-weight:700; font-size:20px; margin:32px 0 10px;}
.article p{font-size:15px; color:var(--ink-soft); margin:0 0 14px;}
.faq-item{border-top:1px solid var(--line); padding:18px 0;}
.faq-item h3{font-family:var(--body); font-weight:700; font-size:15px; margin:0 0 6px; color:var(--ink);}
.faq-item p{margin:0; font-size:14px; color:var(--ink-soft);}

.related{display:flex; gap:10px; flex-wrap:wrap; margin:8px 0 40px;}
.related a{
  font-family:var(--body); font-weight:600; font-size:12.5px; padding:7px 14px; border:1px solid var(--line-strong);
  border-radius:999px; color:var(--ink-soft);
}
.related a:hover{border-color:var(--accent); color:var(--accent); text-decoration:none;}

.breadcrumb{font-family:var(--body); font-size:12.5px; color:var(--ink-faint); padding-top:20px;}
.breadcrumb a{color:var(--ink-faint); font-weight:500;}

/* ---------- static pages ---------- */
.static-page{max-width:680px; margin:48px auto 60px;}
.static-page h1{font-family:var(--display); font-weight:800; font-size:30px; margin-bottom:18px;}
.static-page h2{font-family:var(--display); font-weight:700; font-size:18px; margin:28px 0 8px;}
.static-page p{color:var(--ink-soft); font-size:15px;}

.disclaimer{font-size:12.5px; color:var(--ink-faint); margin-top:10px; font-family:var(--body);}

/* ---------- dark mode ---------- */
html[data-theme="dark"]{
  color-scheme:dark;
  --paper:#14181A;
  --paper-raised:#1C2124;
  --ink:#F1EFEA;
  --ink-soft:#C7CCC8;
  --ink-faint:#8F958F;
  --line:#2B302E;
  --line-strong:#3A403D;

  --accent:#4FBDAE;
  --accent-deep:#2E8F82;
  --accent-ink:#0E1413;
  --accent-2:#E0AE5C;
  --accent-3:#C98CA0;

  --success-soft:#16302C;
  --danger:#E2735F;
  --shadow: 0 8px 28px rgba(0,0,0,.45);
}
html[data-theme="dark"] img{opacity:.94;}
html[data-theme="dark"] .btn{box-shadow:0 8px 24px rgba(79,189,174,.25);}

/* ---------- theme toggle ---------- */
.theme-toggle{
  display:flex; align-items:center; justify-content:center;
  width:36px; height:36px; padding:0; flex:none;
  background:var(--paper-raised); border:1px solid var(--line-strong); border-radius:999px;
  color:var(--ink-soft); cursor:pointer; transition:border-color .15s, color .15s;
}
.theme-toggle:hover{border-color:var(--accent); color:var(--accent);}
.theme-toggle svg{width:17px; height:17px;}
.theme-toggle .icon-moon{display:none;}
html[data-theme="dark"] .theme-toggle .icon-sun{display:none;}
html[data-theme="dark"] .theme-toggle .icon-moon{display:block;}