/* ==========================================================================
   Toolvana design system — single stylesheet, no framework, no webfonts.
   System font stack keeps LCP fast and CLS at zero.
   ========================================================================== */

:root {
  --brand-50:#f5f3ff; --brand-100:#ede9fe; --brand-500:#7c3aed; --brand-600:#6d28d9;
  --brand-700:#5b21b6; --brand-900:#2e1065;
  --ink-900:#111827; --ink-700:#374151; --ink-500:#6b7280; --ink-300:#d1d5db;
  --paper:#ffffff; --bg:#fafafa; --ok:#059669; --err:#dc2626; --warn:#d97706;
  --radius:14px; --radius-sm:9px;
  --shadow-sm:0 1px 2px rgb(17 24 39 / .06),0 1px 3px rgb(17 24 39 / .08);
  --shadow-md:0 4px 12px rgb(17 24 39 / .10);
  --maxw:1080px;
  font-size:16px;
}

* { box-sizing:border-box; }
html { -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body {
  margin:0; background:var(--bg); color:var(--ink-900);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  line-height:1.6; text-rendering:optimizeLegibility;
}
img,svg,video { max-width:100%; height:auto; }

.icon { width:1.25em; height:1.25em; vertical-align:-.22em; flex:none; }

a { color:var(--brand-600); text-decoration:none; }
a:hover { text-decoration:underline; }

:focus-visible { outline:3px solid var(--brand-500); outline-offset:2px; border-radius:4px; }

.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:.6rem 1rem;z-index:99;border-radius:0 0 var(--radius-sm) 0}
.skip-link:focus{left:0}

/* ---------- header ---------- */
.site-header{background:var(--paper);border-bottom:1px solid #eee;position:sticky;top:0;z-index:40}
.site-header .inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:1.2rem;padding:.65rem 1.25rem}
.logo{display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:1.18rem;color:var(--ink-900);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand-600),#a855f7);display:inline-flex;align-items:center;justify-content:center;color:#fff}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:1rem}
.main-nav a{color:var(--ink-700);font-weight:550;font-size:.95rem;padding:.35rem .15rem}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;color:var(--ink-700);padding:.4rem;cursor:pointer}

/* ---------- hero ---------- */
.hero{background:linear-gradient(160deg,var(--brand-700) 0%,#7c3aed 60%,#9333ea 100%);color:#fff;padding:3.4rem 1.25rem 4.2rem;text-align:center}
.hero h1{font-size:clamp(1.8rem,4.5vw,2.9rem);line-height:1.15;margin:.4rem auto 0;font-weight:850;letter-spacing:-.03em;max-width:820px}
.hero .tagline{font-size:clamp(1rem,2vw,1.2rem);opacity:.93;max-width:600px;margin:1rem auto 1.8rem}
.hero-search{display:flex;max-width:560px;margin:0 auto;background:#fff;border-radius:999px;padding:.3rem;box-shadow:var(--shadow-md)}
.hero-search input[type=search]{flex:1;border:0;font-size:1.02rem;padding:.72rem .5rem .72rem 1.15rem;min-width:0;background:none;color:var(--ink-900)}
.hero-search input:focus{outline:none}
.hero-search button{border:0;background:var(--ink-900);color:#fff;border-radius:999px;padding:.68rem 1.5rem;font-weight:650;cursor:pointer;font-size:.97rem}
.hero-stats{margin-top:1.6rem;font-size:.92rem;opacity:.85}

/* ---------- layout blocks ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
section.block{padding:2.6rem 0}
section.block.tight{padding:1.6rem 0}
h2.section-title{font-size:1.45rem;font-weight:800;letter-spacing:-.02em;margin:0 0 1.2rem;display:flex;align-items:center;gap:.6rem}
h2.section-title .see-all{margin-left:auto;font-size:.9rem;font-weight:600}

/* ---------- cards ---------- */
.grid{display:grid;gap:1rem}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}

.card{background:var(--paper);border-radius:var(--radius);padding:1.15rem 1.2rem;box-shadow:var(--shadow-sm);transition:transform .12s ease,box-shadow .12s ease;display:block;color:inherit}
a.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none}
.card h3,.card h2{margin:0 0 .3rem;font-size:1.02rem;font-weight:700;letter-spacing:-.01em}
.card p{margin:0;color:var(--ink-500);font-size:.88rem;line-height:1.5}
.card .icon-wrap{width:42px;height:42px;border-radius:11px;background:var(--brand-50);color:var(--brand-600);display:flex;align-items:center;justify-content:center;margin-bottom:.75rem}
.card .icon-wrap .icon{width:22px;height:22px}
.badge{display:inline-block;font-size:.68rem;font-weight:750;letter-spacing:.06em;text-transform:uppercase;background:var(--brand-50);color:var(--brand-700);padding:.18rem .55rem;border-radius:999px}
.meta-line{font-size:.78rem;color:var(--ink-500);margin-top:.55rem}

.cat-card{display:flex;flex-direction:column;align-items:flex-start;gap:.4rem}
.cat-card .count{font-size:.8rem;color:var(--ink-500)}

/* ---------- tool page ---------- */
.tool-head{margin:2.2rem 0 1rem}
.tool-head h1{font-size:clamp(1.6rem,4vw,2.3rem);font-weight:830;letter-spacing:-.03em;margin:.35rem 0 .4rem;line-height:1.18}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.45rem;margin:1.4rem 0 0;padding:0;font-size:.85rem;color:var(--ink-500)}
.breadcrumbs li+li::before{content:"→";margin-right:.45rem;color:var(--ink-300)}
.breadcrumbs a{color:var(--ink-500)}
.breadcrumbs [aria-current]{color:var(--ink-900);font-weight:600}

.tool-panel{background:var(--paper);border-radius:18px;box-shadow:var(--shadow-sm);padding:1.8rem;margin-top:1.2rem}
.url-form{display:flex;flex-direction:column;gap:.85rem}
.url-row{display:flex;gap:.7rem}
.input-lg{flex:1;border:2px solid var(--ink-300);border-radius:12px;padding:.95rem 1.05rem;font-size:1.04rem;min-width:0;transition:border-color .15s}
.input-lg:focus{outline:none;border-color:var(--brand-500)}
.btn-primary{border:0;background:linear-gradient(135deg,var(--brand-600),#9333ea);color:#fff;font-size:1.05rem;font-weight:700;padding:.95rem 2rem;border-radius:12px;cursor:pointer;min-height:54px;white-space:nowrap}
.btn-primary:hover{filter:brightness(1.06)}
.btn-primary[disabled]{opacity:.6;cursor:not-allowed}
.hint{font-size:.83rem;color:var(--ink-500)}

.dropzone{border:2.5px dashed var(--ink-300);border-radius:16px;padding:2.6rem 1.4rem;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:#fcfcff}
.dropzone:hover,.dropzone.dragover{border-color:var(--brand-500);background:var(--brand-50)}
.dropzone .icon{width:38px;height:38px;color:var(--brand-600)}
.dropzone strong{display:block;font-size:1.05rem;margin:.6rem 0 .2rem}
.dropzone span{font-size:.86rem;color:var(--ink-500)}
.file-chip{display:flex;align-items:center;gap:.75rem;background:var(--brand-50);border-radius:11px;padding:.7rem .9rem;font-size:.9rem}
.file-chip .name{font-weight:650;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-chip button{margin-left:auto;border:0;background:none;color:var(--err);cursor:pointer;font-size:.82rem;font-weight:650}

.status-flow{margin-top:1rem}
.progress-track{height:9px;border-radius:999px;background:#eceefc;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--brand-500),#a855f7);border-radius:999px;transition:width .35s ease}
.stages{list-style:none;display:flex;justify-content:space-between;padding:0;margin:.7rem 0 0;font-size:.76rem;color:var(--ink-500)}
.stages li.done{color:var(--ok);font-weight:650}
.stages li.active{color:var(--brand-700);font-weight:700}

.result-panel{margin-top:1.1rem;border:1px solid #e5e7eb;border-radius:14px;padding:1.1rem;display:none}
.result-panel.show{display:block}
.result-meta{display:grid;grid-template-columns:auto 1fr auto auto;gap:.4rem 1.1rem;font-size:.92rem;align-items:center}
.result-actions{margin-top:.9rem;display:flex;gap:.7rem;flex-wrap:wrap}
.notice{border-left:4px solid var(--warn);background:#fffbeb;padding:.8rem 1rem;border-radius:0 10px 10px 0;font-size:.92rem;margin-top:1rem}
.notice.error{border-color:var(--err);background:#fef2f2}

details.advanced{margin-top:1rem;border:1px solid #e8e8f0;border-radius:11px;padding:.75rem 1rem}
details.advanced summary{cursor:pointer;font-weight:650;font-size:.92rem;color:var(--ink-700)}
.opt-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.9rem;padding-top:.9rem}
.opt-grid label{display:block;font-size:.8rem;font-weight:650;color:var(--ink-700);margin-bottom:.25rem}
.opt-grid select,.opt-grid input[type=number],.opt-grid input[type=text]{width:100%;border:1.5px solid var(--ink-300);border-radius:9px;padding:.5rem .6rem;font-size:.92rem}

.faq details{background:var(--paper);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);margin-bottom:.65rem}
.faq summary{cursor:pointer;font-weight:650;padding:.9rem 1.1rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;color:var(--brand-600);line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .answer{padding:0 1.1rem .95rem;color:var(--ink-700);font-size:.94rem}

.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:.8rem}
.steps li{counter-increment:step;background:var(--paper);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);padding:1rem 1.1rem 1rem 3.4rem;position:relative;font-size:.94rem}
.steps li strong{display:block}
.steps li::before{content:counter(step);position:absolute;left:.95rem;top:1rem;width:26px;height:26px;border-radius:50%;background:var(--brand-600);color:#fff;font-weight:750;display:flex;align-items:center;justify-content:center;font-size:.85rem}

.chips{display:flex;flex-wrap:wrap;gap:.45rem;margin:.4rem 0}
.chip{background:var(--paper);border:1px solid #e5e7eb;border-radius:999px;padding:.28rem .8rem;font-size:.84rem;font-weight:600;color:var(--ink-700)}
.chip:hover{border-color:var(--brand-500);color:var(--brand-600);text-decoration:none}

.prose{max-width:74ch}
.prose h2{font-size:1.3rem;margin:2rem 0 .7rem;letter-spacing:-.02em}
.prose p,.prose ul,.prose ol{color:var(--ink-700);font-size:.98rem}
.prose table{border-collapse:collapse;width:100%;font-size:.9rem;margin:1rem 0}
.prose th,.prose td{border:1px solid #e5e7eb;padding:.5rem .7rem;text-align:left}
.prose th{background:var(--brand-50)}
.prose code{background:#f3f0ff;padding:.1rem .35rem;border-radius:5px;font-size:.88em}

/* ---------- utility/text tools ---------- */
.io-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
textarea.tool-area{width:100%;min-height:190px;border:2px solid var(--ink-300);border-radius:12px;padding:.9rem;font:inherit;font-size:.95rem;resize:vertical}
textarea.tool-area:focus{outline:none;border-color:var(--brand-500)}

/* ---------- footer ---------- */
.site-footer{background:var(--paper);border-top:1px solid #eee;margin-top:3rem;padding:2.4rem 0 2rem;font-size:.9rem}
.footer-cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem}
.footer-cols h4{margin:.2rem 0 .7rem;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-500)}
.footer-cols ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
.footer-bottom{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:var(--ink-500);font-size:.82rem;margin-top:2rem;padding-top:1.2rem;border-top:1px solid #f0f0f0}

/* ---------- errors / misc ---------- */
.center-page{max-width:640px;margin:4rem auto;padding:0 1.25rem;text-align:left}
.error-hero{text-align:center;padding:3.5rem 0 1rem}
.error-hero code.big{font-size:3.4rem;font-weight:850;color:var(--brand-200,#ddd6fe);letter-spacing:-.05em}

@media (max-width:900px){
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .footer-cols{grid-template-columns:1fr 1fr}
  .io-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);
    flex-direction:column;align-items:flex-start;padding:1rem 1.4rem;border-bottom:1px solid #eee;gap:.8rem;
    box-shadow:var(--shadow-md)
  }
  .main-nav.open{display:flex}
  .nav-toggle{display:inline-flex}
  .url-row{flex-direction:column}
  .btn-primary{width:100%}
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .hero-search{flex-direction:row}
  .result-meta{grid-template-columns:1fr auto}
  .stages{flex-wrap:wrap;gap:.3rem;justify-content:flex-start}
  .tool-panel{padding:1.2rem}
}

@media (prefers-reduced-motion:no-preference){
  .progress-fill{animation:pulse 1.4s ease-in-out infinite alternate}
  @keyframes pulse{from{opacity:1}to{opacity:.75}}
}