:root{color-scheme:light;--bg: #f5f8fc;--surface: #ffffff;--surface-strong: #f0f5fb;--text: #0f172a;--muted: #546179;--border: #d9e3ef;--accent: #1167e8;--accent-dark: #0d4fb4;--accent-soft: #eaf2ff;--success: #12805c;--success-bg: #e9f8f1;--danger: #c24141;--danger-bg: #fff0f0;--donate: #b7791f;--shadow: 0 24px 70px rgba(15, 23, 42, .12);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--text)}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}.site-shell{min-height:100vh;overflow-x:hidden}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px;padding:14px clamp(18px,5vw,72px);background:#ffffffe6;border-bottom:1px solid rgba(217,227,239,.86);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand-link{display:inline-flex;align-items:center;gap:11px;min-width:0;color:var(--text);font-size:16px;font-weight:800;letter-spacing:0}.brand-mark{display:inline-grid;flex:0 0 auto;width:36px;height:36px;place-items:center;border-radius:8px;background:var(--accent);color:#fff;font-size:17px;font-weight:900;box-shadow:0 12px 28px #1167e83d}.nav-links{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;font-weight:700}.nav-links a{min-height:38px;display:inline-flex;align-items:center;justify-content:center;padding:0 12px;border-radius:8px}.nav-links a:hover{color:var(--text);background:var(--surface-strong)}.nav-donate{border:1px solid #f0d7aa;color:#865a14;background:#fff8eb}.hero-section{display:grid;grid-template-columns:minmax(0,.95fr) minmax(390px,.8fr);grid-template-areas:"copy converter" "trust converter";gap:clamp(28px,5vw,70px);align-items:center;width:min(1200px,calc(100% - 36px));margin:0 auto;min-height:calc(100vh - 72px);padding:clamp(44px,7vw,92px) 0 clamp(34px,5vw,58px)}.hero-copy{grid-area:copy;display:grid;gap:24px}.hero-copy h1{max-width:720px;margin:0;color:var(--text);font-size:clamp(44px,6vw,76px);font-weight:900;line-height:.95;letter-spacing:0}.hero-lede{max-width:660px;margin:0;color:var(--muted);font-size:clamp(17px,2vw,20px);line-height:1.62}.trust-grid{grid-area:trust;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;max-width:780px}.trust-item{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:start;min-width:0;padding:14px;border:1px solid var(--border);border-radius:8px;background:#ffffffbd}.trust-item svg{color:var(--accent);margin-top:2px}.trust-item strong,.trust-item span{display:block}.trust-item strong{margin-bottom:4px;color:var(--text);font-size:14px;line-height:1.25}.trust-item span{color:var(--muted);font-size:13px;line-height:1.45}.converter-card{grid-area:converter;display:grid;gap:16px;padding:clamp(20px,3vw,28px);border:1px solid rgba(217,227,239,.92);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.converter-heading{display:flex;align-items:start;justify-content:space-between;gap:16px}.converter-heading h2{margin:0 0 6px;color:var(--text);font-size:25px;line-height:1.12}.converter-heading p,.field-helper{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.free-pill{display:inline-flex;align-items:center;justify-content:center;min-height:30px;padding:0 10px;border-radius:8px;background:var(--success-bg);color:var(--success);font-size:12px;font-weight:900;text-transform:uppercase}.field-label{color:var(--text);font-size:14px;font-weight:800}.select-input{width:100%;min-height:48px;padding:0 13px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);font-size:15px;outline:none}.select-input:focus{border-color:#1167e8b8;box-shadow:0 0 0 3px #1167e824}.upload-box{display:grid;justify-items:center;gap:10px;min-height:220px;padding:28px;border:1.5px dashed #a9bad0;border-radius:8px;background:#f8fbff;color:var(--muted);text-align:center;transition:border-color .16s ease,background-color .16s ease}.upload-box.dragging{border-color:var(--accent);background:var(--accent-soft)}.upload-box svg{color:#637083}.upload-box strong{max-width:100%;overflow:hidden;color:var(--text);font-size:18px;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.upload-box span{color:var(--muted);font-size:13px;line-height:1.45}.file-input{display:none}.primary-button,.secondary-button,.support-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border-radius:8px;font-size:14px;font-weight:850;line-height:1;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease}.primary-button{padding:0 18px;border:1px solid var(--accent);background:var(--accent);color:#fff;box-shadow:0 14px 32px #1167e83d}.primary-button:hover{background:var(--accent-dark);border-color:var(--accent-dark)}.primary-button:disabled{cursor:not-allowed;opacity:.68;transform:none;box-shadow:none}.secondary-button{min-height:40px;padding:0 14px;border:1px solid var(--border);background:#fff;color:var(--text)}.secondary-button:hover{border-color:#b9c8db;background:#f6f9fd}.convert-button{width:100%}.format-strip{display:flex;align-items:center;gap:9px;min-height:42px;padding:11px 12px;border:1px solid var(--border);border-radius:8px;background:#f8fbff;color:var(--muted);font-size:13px;line-height:1.45}.format-strip svg{flex:0 0 auto;color:var(--accent)}.upload-guide{display:grid;gap:3px;padding:12px;border:1px solid #cfe0f4;border-radius:8px;background:#f2f7ff}.upload-guide strong{color:var(--text);font-size:13px;line-height:1.3}.upload-guide span{color:var(--muted);font-size:13px;line-height:1.45}.status-message{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:start;padding:12px;border-radius:8px;font-size:14px;line-height:1.45}.status-message strong{font-weight:850}.status-message.success{border:1px solid #bfe8d2;background:var(--success-bg);color:#0e6046}.status-message.error{border:1px solid #f0c6c6;background:var(--danger-bg);color:var(--danger)}.donation-after-success{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px;border:1px solid #efd39e;border-radius:8px;background:#fff9ec;color:#6f480f;font-size:13px;font-weight:750}.mini-donate-button{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:0 12px;border:1px solid #d69f39;border-radius:8px;background:#fff;color:#8a5a12;font-size:13px;font-weight:850;white-space:nowrap}.mini-donate-button:hover{background:#fff3d6}.content-band,.privacy-section,.support-section{width:min(1200px,calc(100% - 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