/* ToolHub — premium design system */
:root{
  --bg:#0b0d17;
  --surface:#151827;
  --surface-2:#1c2033;
  --border:#262b42;
  --text:#e9ecf5;
  --muted:#8a90a8;
  --primary:#6366f1;
  --primary-2:#8b5cf6;
  --accent:#22d3ee;
  --success:#10b981;
  --warn:#f59e0b;
  --danger:#ef4444;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 10px 30px -10px rgba(99,102,241,.35);
  --grad:linear-gradient(135deg,#6366f1,#8b5cf6 50%,#22d3ee);
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.15),rgba(34,211,238,.08));
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:'';position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(60% 50% at 10% 0%, rgba(99,102,241,.18), transparent 60%),
    radial-gradient(50% 40% at 90% 10%, rgba(34,211,238,.12), transparent 60%),
    radial-gradient(60% 50% at 50% 100%, rgba(139,92,246,.12), transparent 60%);
}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace}
.muted{color:var(--muted)}
.small{font-size:.85rem}
a{color:var(--accent)}

/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(20px);background:rgba(11,13,23,.75);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.25rem}
.logo-mark{font-size:1.4rem}
.logo-text span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:28px}
.nav-links a{color:var(--muted);text-decoration:none;font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--text)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font-family:inherit;font-weight:600;font-size:.92rem;cursor:pointer;text-decoration:none;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--grad);border:none;color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{box-shadow:0 14px 36px -10px rgba(99,102,241,.55)}
.btn-secondary{background:var(--surface-2);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--primary)}
.btn-ghost{background:transparent}
.btn-lg{padding:14px 26px;font-size:1rem}
.btn.full{width:100%}
.btn.disabled{opacity:.5;pointer-events:none}

/* Hero */
.hero{padding:70px 0 50px}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:60px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:99px;background:var(--grad-soft);border:1px solid var(--border);font-size:.82rem;color:var(--text);margin-bottom:20px}
.hero h1{font-size:clamp(2.2rem,5vw,3.8rem);line-height:1.1;font-weight:800;letter-spacing:-.02em;margin-bottom:20px}
.gradient-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:1.15rem;color:var(--muted);margin-bottom:32px;max-width:620px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.stats{display:flex;gap:40px}
.stats > div{display:flex;flex-direction:column}
.stats strong{font-size:1.8rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats span{color:var(--muted);font-size:.85rem}

.hero-visual{position:relative;height:420px}
.orb{position:absolute;inset:10% 10%;border-radius:50%;background:var(--grad);filter:blur(60px);opacity:.5;animation:pulse 6s ease-in-out infinite}
@keyframes pulse{50%{transform:scale(1.1);opacity:.7}}
.floating-card{position:absolute;padding:18px 26px;border-radius:var(--radius);background:rgba(21,24,39,.85);backdrop-filter:blur(20px);border:1px solid var(--border);font-weight:600;box-shadow:var(--shadow);animation:float 5s ease-in-out infinite}
.card-1{top:10%;left:5%}
.card-2{top:45%;right:5%;animation-delay:1.5s}
.card-3{bottom:10%;left:25%;animation-delay:3s}
@keyframes float{50%{transform:translateY(-14px)}}

/* Section heads */
.section-head{text-align:center;margin:60px auto 40px;max-width:680px}
.section-head h2{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:800;letter-spacing:-.02em;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:1.05rem}

/* Tool cards (index) */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-bottom:40px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--text);transition:transform .2s,border-color .2s,box-shadow .3s;display:flex;flex-direction:column;gap:10px}
.tool-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow)}
.tool-card h3{font-size:1.1rem;font-weight:700}
.tool-card p{color:var(--muted);font-size:.9rem;flex:1}
.card-cta{color:var(--accent);font-weight:600;font-size:.9rem;margin-top:6px}
.tool-icon{width:48px;height:48px;display:grid;place-items:center;background:var(--grad);border-radius:12px;font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:6px}

/* Tool page */
.breadcrumb{padding:18px 24px;color:var(--muted);font-size:.9rem;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span[aria-current]{color:var(--text);font-weight:600}
.tool-hero{padding:30px 0 40px;text-align:center}
.tool-icon-lg{width:72px;height:72px;display:grid;place-items:center;background:var(--grad);border-radius:18px;font-size:2rem;font-weight:800;color:#fff;margin:0 auto 20px;box-shadow:var(--shadow)}
.tool-hero h1{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.tool-hero .lead{margin:0 auto;text-align:center}

.tool-page{display:flex;flex-direction:column;gap:50px;padding-bottom:60px}
.tool-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;max-width:760px;margin:0 auto;width:100%;box-shadow:var(--shadow)}
.tool-widget{display:flex;flex-direction:column;gap:12px}

.content-block{max-width:860px;margin:0 auto;width:100%}
.content-block h2{font-size:1.6rem;font-weight:800;margin-bottom:20px;letter-spacing:-.01em}
.content-block p{color:var(--muted);margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:1.4rem;color:var(--muted);margin-bottom:12px}
.content-block li{margin-bottom:6px}
.how-list{counter-reset:step;list-style:none;padding:0}
.how-list li{counter-increment:step;padding:14px 14px 14px 60px;position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px;color:var(--text)}
.how-list li::before{content:counter(step);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800}

/* Inputs */
.input{width:100%;padding:11px 14px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-family:inherit;font-size:.92rem;transition:border-color .2s}
.input:focus{outline:none;border-color:var(--primary)}
.input.area{min-height:120px;resize:vertical;font-family:'JetBrains Mono',monospace;line-height:1.5}
.row{display:flex;gap:10px;align-items:center;flex-wrap:nowrap}
.row.wrap{flex-wrap:wrap}
.row > .input,.row > select.input{flex:1;min-width:0}
.controls{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:.88rem}
.controls label{display:flex;flex-direction:column;gap:4px;color:var(--muted)}
.check{flex-direction:row !important;align-items:center;gap:8px !important}
.check input{accent-color:var(--primary)}
input[type=range]{accent-color:var(--primary);width:100%}
.color-input{width:60px;height:42px;padding:4px;cursor:pointer;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm)}
hr{border:none;border-top:1px solid var(--border);margin:4px 0}

/* Output */
.output{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px;min-height:60px;white-space:pre-wrap;word-break:break-word;font-size:.88rem}
.output.big{font-size:1.4rem;font-weight:700;text-align:center;color:var(--accent);padding:18px}

/* Meter */
.meter{height:8px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.meter-bar{height:100%;width:0;background:var(--danger);border-radius:99px;transition:width .3s,background .3s}

/* QR */
.qr-wrap{display:grid;place-items:center;padding:14px;background:#fff;border-radius:var(--radius-sm);min-height:180px}
.qr-wrap img{max-width:100%;display:block}

/* Dropzone */
.dropzone{display:grid;place-items:center;border:2px dashed var(--border);border-radius:var(--radius-sm);padding:30px;cursor:pointer;color:var(--muted);transition:border-color .2s,background .2s}
.dropzone:hover{border-color:var(--primary);background:var(--grad-soft);color:var(--text)}
.dropzone.drag{border-color:var(--accent);background:var(--grad-soft)}

/* Palette */
.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.swatch{aspect-ratio:1/1.2;border-radius:var(--radius-sm);display:flex;align-items:flex-end;justify-content:center;padding:8px;font-size:.7rem;font-weight:700;cursor:pointer;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.5);transition:transform .15s}
.swatch:hover{transform:scale(1.05)}

/* URL report */
.url-report{display:flex;flex-direction:column;gap:6px;font-size:.88rem}
.url-report .item{display:flex;justify-content:space-between;padding:8px 12px;background:var(--surface-2);border-radius:8px}
.url-report .item span:first-child{color:var(--muted)}
.url-report .item span:last-child{font-family:'JetBrains Mono',monospace;color:var(--text);word-break:break-all;text-align:right;max-width:60%}

/* Features */
.features{padding:40px 0 60px}
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .2s,border-color .2s}
.feat:hover{transform:translateY(-3px);border-color:var(--primary)}
.feat-icon{font-size:1.8rem;margin-bottom:12px}
.feat h3{font-size:1.05rem;margin-bottom:8px}
.feat p{color:var(--muted);font-size:.92rem}

/* Related */
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.related-card{display:flex;gap:14px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-decoration:none;color:var(--text);transition:border-color .2s,transform .2s}
.related-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.related-card .tool-icon{width:40px;height:40px;font-size:1rem;margin:0;flex-shrink:0}
.related-card > div{display:flex;flex-direction:column;gap:2px}
.related-card strong{font-size:.95rem}

/* FAQ (details) */
.faq{padding:40px 0 80px}
.faq details, .content-block details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin-bottom:12px;cursor:pointer;transition:border-color .2s}
.faq details:hover, .content-block details:hover{border-color:var(--primary)}
.faq summary, .content-block summary{font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.faq summary::after, .content-block summary::after{content:'+';font-size:1.4rem;color:var(--primary);transition:transform .2s}
.faq details[open] summary::after, .content-block details[open] summary::after{transform:rotate(45deg)}
.faq details p, .content-block details p{margin-top:12px;color:var(--muted)}

/* Content pages */
.content-page{padding:30px 0 80px;display:flex;flex-direction:column;gap:30px}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--surface);padding:50px 0 24px;margin-top:60px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:30px}
.foot-grid h4{font-size:.95rem;margin-bottom:14px}
.foot-grid a{display:block;color:var(--muted);text-decoration:none;font-size:.88rem;padding:4px 0;transition:.2s}
.foot-grid a:hover{color:var(--text)}
.foot-bot{border-top:1px solid var(--border);padding-top:20px;text-align:center}

/* Toast */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(120%);background:var(--surface);border:1px solid var(--primary);padding:12px 22px;border-radius:99px;font-weight:600;box-shadow:var(--shadow);z-index:100;transition:transform .3s}
.toast.show{transform:translateX(-50%) translateY(0)}

/* Responsive */
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero-visual{height:260px}
  .nav-links{display:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .stats{gap:24px}
}
@media (max-width:500px){
  .tools-grid{grid-template-columns:1fr}
  .controls{grid-template-columns:1fr}
  .palette{grid-template-columns:repeat(3,1fr)}
  .foot-grid{grid-template-columns:1fr}
  .nav-cta{display:none}
  .tool-panel{padding:20px}
}