:root{--bg: #0c0c0e;--surface: #16161a;--border: #2a2a32;--text: #f4f4f5;--muted: #8b8b96;--accent: #7c9cff;--accent-dim: #5a7ae0;--radius: 14px;--font: system-ui, "Segoe UI", Roboto, Ubuntu, sans-serif;--safe-bottom: env(safe-area-inset-bottom, 0px)}*,*:before,*:after{box-sizing:border-box}html{color-scheme:dark}body{margin:0;min-height:100dvh;font-family:var(--font);font-size:16px;line-height:1.5;background:var(--bg);color:var(--text);-webkit-tap-highlight-color:transparent}.app{max-width:40rem;margin:0 auto;padding:1.25rem 1rem calc(1.25rem + var(--safe-bottom));min-height:100dvh;display:flex;flex-direction:column}.header{text-align:center;margin-bottom:1.5rem}.header h1{margin:0;font-size:1.5rem;font-weight:600;letter-spacing:-.02em}.tagline{margin:.35rem 0 0;font-size:.875rem;color:var(--muted)}.main{flex:1;display:flex;flex-direction:column;gap:1rem}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.35rem;min-height:8.5rem;padding:1.25rem;border:1.5px dashed var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;transition:border-color .15s ease,background .15s ease}.dropzone:hover,.dropzone:focus-within{border-color:var(--accent-dim);background:#1a1a22}.dropzone-text{font-weight:500}.dropzone-hint{font-size:.8125rem;color:var(--muted)}.preview-panel[hidden]{display:none}.preview-panel{width:100%}.preview-card{padding:1rem 1.1rem;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);text-align:left}.preview-label{margin:0 0 .25rem;font-size:.6875rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}.preview-filename{margin:0 0 .75rem;font-size:.9375rem;font-weight:500;word-break:break-word}.preview-meta{margin:0 0 1rem;font-size:.875rem;color:var(--muted)}.preview-meta-label{margin-right:.35rem}.preview-duration{color:var(--text);font-variant-numeric:tabular-nums}.preview-range{margin:0 0 1rem;padding-bottom:.25rem}.preview-range-heading{margin:0 0 .35rem;font-size:.8125rem;font-weight:500;color:var(--text)}.preview-range-summary{margin:0 0 .5rem;font-size:.8125rem;color:var(--muted);font-variant-numeric:tabular-nums}.preview-range-manual{display:flex;flex-direction:row;gap:.75rem;align-items:flex-end;margin-bottom:.35rem}.preview-range-manual-field{flex:1 1 0;min-width:0}.preview-range-manual-label{display:block;margin-bottom:.25rem;font-size:.6875rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.preview-range-manual-input{box-sizing:border-box;width:100%;padding:.4rem .5rem;font:inherit;font-size:.875rem;font-variant-numeric:tabular-nums;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px}.preview-range-manual-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 35%,transparent)}.preview-range-manual-input:disabled{opacity:.45;cursor:not-allowed}.preview-range-manual-hint{margin:0 0 .45rem;font-size:.6875rem;color:var(--muted);line-height:1.35}.preview-range-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.preview-range-timeline{--range-p0: 0%;--range-p1: 0%;position:relative;height:2.75rem;margin:.05rem 0 0}.preview-range-timeline-bar{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);height:6px;border-radius:3px;background:var(--border);pointer-events:none;overflow:hidden}.preview-range-timeline-bar:after{content:"";position:absolute;left:var(--range-p0, 0%);width:calc(var(--range-p1, 100%) - 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