:root{
  --bg:#f7f8fc;--surface:#fff;--ink:#111827;--muted:#667085;--line:#e6e8ef;
  --primary:#4f46e5;--primary-dark:#3730a3;--success:#059669;--soft:#eef2ff;
  --shadow:0 18px 50px rgba(17,24,39,.08);--radius:20px;--max:1180px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}
button,input{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,232,239,.8)}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-size:1.05rem;font-weight:800;letter-spacing:-.02em}
.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;font-size:.72rem;letter-spacing:.03em;box-shadow:0 8px 18px rgba(79,70,229,.25)}
.brand-accent{color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:28px;color:#667085;font-size:.94rem;font-weight:650}
.main-nav a{padding:8px 0;position:relative}
.main-nav a:hover,.main-nav a.active{color:var(--ink)}
.main-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);border-radius:4px}
.menu-toggle{display:none;border:0;background:none;font-size:1.5rem}
.hero{padding:88px 0 72px;background:radial-gradient(circle at 80% 10%,#e9e7ff 0,transparent 35%),linear-gradient(180deg,#fff 0,#f7f8fc 100%)}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:70px;align-items:center}
.eyebrow,.section-kicker{color:var(--primary);font-weight:800;letter-spacing:.12em;font-size:.74rem}
.eyebrow span{font-size:.65rem}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(2.7rem,5.2vw,5rem);line-height:1.02;letter-spacing:-.055em;margin:18px 0 22px;max-width:760px}
h1 span{color:var(--primary)}
.hero-lead{font-size:1.13rem;color:var(--muted);max-width:680px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 22px}
.btn{border:1px solid transparent;border-radius:12px;min-height:48px;padding:12px 20px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:750;transition:.2s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px rgba(79,70,229,.2)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost{background:transparent;border-color:var(--line)}
.btn-success{background:var(--success);color:#fff;box-shadow:0 10px 22px rgba(5,150,105,.18)}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.trust-row{display:flex;gap:18px;flex-wrap:wrap;color:#667085;font-size:.86rem}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:28px;box-shadow:var(--shadow);transform:rotate(1.2deg)}
.hero-card-top{color:#667085;font-size:.85rem;font-weight:700;margin-bottom:34px}
.status-dot{display:inline-block;width:9px;height:9px;background:#10b981;border-radius:50%;margin-right:7px;box-shadow:0 0 0 5px #ecfdf5}
.format-flow{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#98a2b3;font-weight:800}
.format-pill{padding:20px 14px;border:1px solid var(--line);border-radius:16px;background:#fafafa;font-weight:850;color:#344054}
.format-pill.featured{background:var(--soft);border-color:#c7d2fe;color:var(--primary)}
.mini-stat{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px;margin-top:24px;color:#98a2b3;font-size:.84rem}
.mini-stat strong{color:var(--ink)}
.converter-section{padding:80px 0}
.section-heading{margin-bottom:30px}
.section-heading.centered{text-align:center}
.section-heading h2{font-size:clamp(2rem,3vw,3rem);line-height:1.1;letter-spacing:-.04em;margin:8px 0 10px}
.section-heading p{color:var(--muted);margin-bottom:0}
.converter-shell{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.converter-tabs{display:flex;gap:5px;overflow-x:auto;padding:10px;border-bottom:1px solid var(--line);scrollbar-width:thin}
.converter-tab{border:0;background:transparent;color:#667085;padding:12px 15px;border-radius:10px;white-space:nowrap;font-weight:750}
.converter-tab:hover{background:#f5f6fa;color:var(--ink)}
.converter-tab.active{background:var(--soft);color:var(--primary)}
.converter-panel{padding:36px}
.drop-zone{border:1.5px dashed #cfd4df;border-radius:18px;min-height:340px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px;background:linear-gradient(180deg,#fff,#fafbff);transition:.2s}
.drop-zone:hover,.drop-zone.dragging{border-color:var(--primary);background:#f8f8ff}
.upload-icon{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;background:var(--soft);color:var(--primary);font-size:1.7rem;font-weight:800;margin-bottom:15px}
.drop-zone h3{margin-bottom:5px;font-size:1.2rem}
.drop-zone p{color:var(--muted);margin-bottom:18px}
.drop-zone small{color:#98a2b3;margin-top:14px}
.hidden{display:none!important}
.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.preview-card{border:1px solid var(--line);border-radius:16px;padding:14px;background:#fbfcfe;min-width:0}
.preview-label{font-weight:800;font-size:.82rem;margin-bottom:10px}
.preview-card img{width:100%;height:310px;object-fit:contain;border-radius:12px;background:repeating-conic-gradient(#f1f3f7 0 25%,#fff 0 50%) 50%/20px 20px}
.converted-placeholder{height:310px;border-radius:12px;background:#f4f5f8;display:flex;align-items:center;justify-content:center;flex-direction:column;color:#98a2b3}
.converted-placeholder span{font-size:2rem;color:var(--primary)}
.preview-meta{font-size:.78rem;color:var(--muted);padding:10px 2px 0;word-break:break-word}
.controls{display:flex;gap:22px;align-items:center;margin:22px 0}
.quality-control{flex:1}
.quality-control label{display:flex;justify-content:space-between;font-weight:750;margin-bottom:8px}
.quality-control small{color:var(--muted)}
.quality-control input{width:100%;accent-color:var(--primary)}
.background-control{display:flex;align-items:center;gap:10px;font-weight:750}
.background-control input{width:44px;height:38px;padding:3px;border:1px solid var(--line);border-radius:8px;background:#fff}
.action-bar{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.message{min-height:0;margin-top:14px}
.message.error{background:#fff1f2;color:#be123c;border:1px solid #fecdd3;padding:11px 14px;border-radius:10px}
.success-icon{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:#ecfdf3;color:var(--success);font-size:1.7rem;font-weight:900;margin:8px auto 15px}
.download-state{text-align:center;padding:30px 10px}
.download-state h3{font-size:1.6rem;margin-bottom:6px}
.download-state p{color:var(--muted)}
.download-state .action-bar{justify-content:center}
.result-stats{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:24px 0}
.result-stats span{min-width:130px;padding:13px 15px;border:1px solid var(--line);border-radius:12px;background:#fafafa}
.result-stats strong,.result-stats small{display:block}
.result-stats small{color:var(--muted);font-size:.72rem;margin-top:2px}
.tools-section{padding:78px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tool-card{text-align:left;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;transition:.2s;min-height:175px}
.tool-card:hover{border-color:#c7d2fe;box-shadow:0 12px 30px rgba(17,24,39,.07);transform:translateY(-2px)}
.tool-card strong,.tool-card small{display:block}
.tool-card strong{margin:16px 0 5px}
.tool-card small{color:var(--muted);line-height:1.45}
.tool-icon{display:inline-grid;place-items:center;height:42px;min-width:42px;padding:0 8px;border-radius:11px;font-size:.68rem;font-weight:900;background:#f3f4f6;color:#344054}
.tool-icon.jpg{background:#fff7ed;color:#c2410c}.tool-icon.png{background:#eff6ff;color:#2563eb}.tool-icon.webp{background:#f0fdf4;color:#15803d}.tool-icon.svg{background:#faf5ff;color:#7e22ce}
.feature-section,.faq-section{padding:80px 0}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature-grid article{padding:28px;border:1px solid var(--line);border-radius:18px;background:#fff}
.feature-number{color:var(--primary);font-size:.8rem;font-weight:900;letter-spacing:.1em;margin-bottom:45px}
.feature-grid h3{font-size:1.2rem}
.feature-grid p{color:var(--muted);margin-bottom:0}
.narrow{max-width:820px}
.faq-section{background:#fff;border-top:1px solid var(--line)}
details{border-top:1px solid var(--line);padding:20px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:800}
details p{color:var(--muted);margin:12px 0 0;max-width:700px}
.site-footer{background:#111827;color:#d0d5dd;padding:55px 0 22px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px}
.footer-brand{color:#fff}.site-footer p{color:#98a2b3;max-width:360px;margin-top:15px}
.site-footer h3{color:#fff;font-size:.9rem}.site-footer .footer-grid>div:not(:first-child) a{display:block;color:#98a2b3;margin:9px 0;font-size:.88rem}.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #293241;margin-top:42px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;font-size:.78rem;color:#98a2b3}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:35px}.hero-card{max-width:600px}.tool-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.container{width:min(var(--max),calc(100% - 28px))}.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:14px 20px;flex-direction:column;align-items:stretch;gap:2px}.main-nav.open{display:flex}.main-nav a{padding:13px}.main-nav a.active:after{display:none}.hero{padding:60px 0 45px}h1{font-size:clamp(2.4rem,12vw,3.5rem)}.converter-section,.tools-section,.feature-section,.faq-section{padding:60px 0}.converter-panel{padding:18px}.preview-grid,.feature-grid{grid-template-columns:1fr}.preview-card img,.converted-placeholder{height:240px}.controls{align-items:stretch;flex-direction:column}.tool-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{flex-direction:column}.format-flow{gap:6px}.format-pill{padding:15px 9px;font-size:.8rem}}
@media(max-width:430px){.hero-actions .btn,.action-bar .btn{width:100%}.trust-row{flex-direction:column;gap:6px}.converter-tabs{padding:8px}.drop-zone{min-height:300px}}

.page-hero{padding:78px 0 54px;background:linear-gradient(180deg,#fff,#f7f8fc);border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(2.5rem,5vw,4rem);margin:12px 0 16px}
.page-hero p{font-size:1.08rem;color:var(--muted);max-width:700px}
.legal-content{padding:52px 0 80px}
.legal-section{padding:0 0 30px;margin-bottom:30px;border-bottom:1px solid var(--line)}
.legal-section:last-child{border-bottom:0}
.legal-section h2{font-size:1.35rem;margin-bottom:10px}
.legal-section p{color:#667085}
.legal-section strong{color:var(--ink)}