:root{--navy:#102744;--blue:#2367c9;--blue2:#3478d4;--ink:#1e293b;--muted:#718096;--line:#e2e8f0;--bg:#f4f7fb;--white:#fff}
*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink)}
.app-shell{min-height:100vh;display:flex}.sidebar{width:270px;background:var(--navy);color:#fff;padding:32px 19px 22px;display:flex;flex-direction:column;flex-shrink:0}
.brand-mark{height:44px;width:44px;border-radius:13px;object-fit:cover;display:grid;place-items:center;margin-bottom:16px;box-shadow:0 8px 22px #07172c55}
.brand h1{font-size:21px;letter-spacing:2px;margin:0 0 4px}.brand span{font-size:9px;letter-spacing:2px;color:#a9c0da}.sidebar nav{display:grid;gap:9px;margin-top:48px}
.nav-item{width:100%;border:0;background:transparent;color:#c5d5e7;padding:14px 12px;text-align:left;border-radius:10px;font-size:13px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:.2s}
.nav-item:hover{background:#1a395b;color:#fff}.nav-item.active{background:#254a73;color:#fff;box-shadow:inset 3px 0 #75b2ff}.nav-icon{font-size:20px;width:22px;text-align:center}
.sidebar-bottom{margin-top:auto;display:flex;gap:10px;padding:15px 10px;border-top:1px solid #29415d;color:#c4d4e5}.shield{background:#1f4d47;color:#8de0be;border-radius:9px;width:28px;height:28px;display:grid;place-items:center;flex-shrink:0}.sidebar-bottom p{font-size:11px;line-height:1.6;margin:0}.sidebar-bottom strong{color:#fff}.sidebar-bottom span{color:#a8bdd3}
.main{width:min(100%,1120px);margin:0 auto;padding:36px 46px 22px;min-width:0}.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:27px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:800;color:#8290a4}.topbar h2{font-size:27px;letter-spacing:-.6px;margin:7px 0 0;color:#17283e}.status{border:1px solid #dce8e4;background:#f0faf6;color:#3d7967;border-radius:30px;padding:9px 13px;font-size:11px;white-space:nowrap;display:flex;align-items:center;gap:7px}.status-indicator{display:inline-block;width:7px;height:7px;background:#44b58c;border-radius:50%;flex:none}
.intro{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(115deg,#e8f1ff,#f6f9ff);border:1px solid #dce8fa;border-radius:16px;padding:23px 26px;margin-bottom:20px}.intro h3{font-size:18px;margin:0 0 7px;color:#18395f}.intro p{font-size:12px;color:#647994;margin:0;line-height:1.6}.intro-icon{height:56px;width:56px;border-radius:16px;background:#d4e5ff;color:#2768bf;display:grid;place-items:center;font-size:29px;flex-shrink:0;margin-left:15px}
.converter-card{background:#fff;border:1px solid #e4eaf2;border-radius:16px;padding:27px;box-shadow:0 8px 30px #19324b08}.step-title{display:flex;align-items:center;gap:12px;margin-bottom:17px}.step-title>span{height:28px;width:28px;background:#e8f1ff;color:#2868bc;display:grid;place-items:center;border-radius:9px;font-size:12px;font-weight:800}.step-title strong{display:block;font-size:13px;color:#25364c}.step-title small{display:block;font-size:11px;color:#8794a6;margin-top:4px}
.dropzone{min-height:180px;border:1.5px dashed #b9cde6;border-radius:13px;background:#fbfdff;display:flex;align-items:center;justify-content:center;flex-direction:column;cursor:pointer;transition:.2s;padding:22px;text-align:center}.dropzone:hover,.dropzone.dragover{border-color:#3478d4;background:#f1f7ff}.upload-icon{height:40px;width:40px;border-radius:12px;background:#e8f1ff;color:#2d70ca;display:grid;place-items:center;font-size:25px;margin-bottom:12px}.dropzone strong{font-size:13px;color:#2d4059}.dropzone>span{font-size:11px;color:#8391a4;margin-top:7px}.dropzone em{font-style:normal;font-size:10px;color:#4e7fbd;background:#eef5ff;border-radius:6px;padding:6px 9px;margin-top:13px;max-width:100%;overflow-wrap:anywhere}.dropzone em.selected-file{color:#1b7657;background:#e8f8f0}#file-input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.second-step{margin-top:27px}.format-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.format-field label{display:block;font-size:11px;color:#6d7b8f;font-weight:700;margin-bottom:8px}.format-field select{width:100%;padding:13px 12px;border:1px solid #dce4ee;border-radius:9px;background:#fff;color:#26374e;font-size:12px;outline:none}.format-field select:focus{border-color:#4c8bdf;box-shadow:0 0 0 3px #3478d41a}.format-note{display:flex;align-items:center;gap:10px;padding:12px;background:#f7f9fc;border-radius:9px;align-self:end;min-height:43px}.note-icon{height:28px;width:28px;border-radius:8px;background:#e5efff;color:#2f70c4;display:grid;place-items:center;font-size:18px}.format-note strong{display:block;font-size:11px;color:#394c64}.format-note small{display:block;font-size:10px;color:#8a97a8;margin-top:4px}
.convert-button{margin-top:24px;width:100%;border:0;border-radius:10px;padding:15px 18px;background:var(--blue);color:white;font-size:13px;font-weight:750;cursor:pointer;box-shadow:0 7px 15px #2367c92b;transition:.2s}.convert-button:hover{background:#1958b1;transform:translateY(-1px)}.convert-button>span:first-child{margin-right:7px}.convert-button .arrow{float:right;font-size:18px;line-height:14px}.convert-button.working{opacity:.8}.privacy-note{text-align:center;font-size:10px;color:#909bad;margin:13px 0 0;line-height:1.5}
footer{display:flex;justify-content:space-between;gap:10px;color:#9aa5b4;font-size:10px;padding:24px 3px 0}footer span{text-align:right}
.alerts{margin-bottom:18px}.alert{padding:12px 15px;border-radius:9px;font-size:12px;margin-bottom:8px}.alert.error{background:#fff0f0;color:#a52b2b;border:1px solid #ffd8d8}
.main>.alert{margin:0 0 18px}.main>.alert[hidden]{display:none}.alert.success{background:#eaf8f1;color:#226647;border:1px solid #c8ecd8}.convert-button:disabled{opacity:.7;cursor:wait;transform:none}.nav-item:focus-visible,.dropzone:focus-within,.format-field select:focus-visible,.convert-button:focus-visible{outline:3px solid #83b9ff;outline-offset:3px}
.nav-item:disabled,.dropzone.busy{cursor:wait;opacity:.7}.dropzone.busy{pointer-events:none}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(max-width:850px){.sidebar{width:220px}.main{padding:28px 25px}.format-row{grid-template-columns:1fr}.topbar h2{font-size:23px}}
@media(max-width:620px){.app-shell{display:block}.sidebar{width:100%;padding:17px;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:0 12px}.brand-mark{grid-row:span 1;margin:0}.brand h1{font-size:18px}.brand span{font-size:8px}.sidebar nav{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;margin-top:18px;gap:6px}.nav-item{padding:12px 8px;font-size:11px;gap:7px}.nav-icon{font-size:17px;width:18px}.sidebar-bottom{display:none}.main{padding:24px 15px}.topbar{align-items:flex-start}.topbar h2{font-size:21px}.status{font-size:9px;padding:8px}.intro{padding:18px}.intro h3{font-size:16px}.intro p{font-size:11px}.intro-icon{width:44px;height:44px;font-size:23px}.converter-card{padding:18px}.dropzone{min-height:160px}footer{display:block;line-height:1.8}footer span{display:block;text-align:left}}