* { box-sizing: border-box; }
:root {
    color-scheme: light dark;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    --bg: #f5f6f8; --panel: #ffffff; --text: #18212e; --muted: #556275; --line: #d9dfe7;
    --accent: #2457a6; --accent-soft: #e8effa; --warn: #8a5a00; --warn-soft: #fff4dc;
    --error: #9b2c22; --error-soft: #fdeeec; --code-bg: #f3f5f8;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12161c; --panel: #1b2129; --text: #e6eaf0; --muted: #9aa6b6; --line: #313a46;
        --accent: #7aa7ec; --accent-soft: #223249; --warn: #f0c56b; --warn-soft: #3a2f17;
        --error: #f19a90; --error-soft: #3d1f1c; --code-bg: #151a21;
    }
}
body { margin: 0; background: var(--bg); color: var(--text); }
main { max-width: 900px; margin: auto; padding: 32px 16px 48px; }
h1 { font-size: clamp(1.75rem, 5vw, 2.4rem); letter-spacing: -0.03em; margin: 0 0 8px; }
h2 { font-size: 1.05rem; margin: 0; overflow-wrap: anywhere; }
p { line-height: 1.55; }
.intro { color: var(--muted); margin: 0 0 24px; }
a { color: var(--accent); }
.dropzone {
    display: grid; place-items: center; gap: 8px; text-align: center;
    padding: 40px 20px; border: 2px dashed var(--line); border-radius: 14px;
    background: var(--panel); cursor: pointer;
}
.dropzone strong { font-size: 1.1rem; }
.dropzone span { color: var(--muted); font-size: 0.9rem; }
.dropzone.dragging, .dropzone:hover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone:has(input:focus-visible) { outline: 3px solid var(--accent); outline-offset: 3px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin: 16px 0; }
#status { margin: 0; color: var(--muted); font-size: 0.9rem; }
#status[data-state="error"] { color: var(--error); }
button {
    font: inherit; font-size: 0.875rem; padding: 7px 14px; border-radius: 8px; cursor: pointer;
    border: 1px solid var(--line); background: var(--panel); color: var(--text);
}
button:hover { border-color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
#results { display: grid; gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 20px; min-width: 0; }
.card-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px; margin-bottom: 4px; }
.card-head .size { color: var(--muted); font-size: 0.875rem; white-space: nowrap; }
.description { margin: 0 0 16px; font-size: 1rem; overflow-wrap: anywhere; }
.pending { color: var(--muted); font-style: italic; }
dl { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 16px; margin: 0; font-size: 0.9rem; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.mime { background: var(--accent-soft); border-radius: 5px; padding: 1px 6px; }
.note { border-radius: 8px; padding: 8px 12px; margin: 16px 0 0; font-size: 0.875rem; }
.note.warn { background: var(--warn-soft); color: var(--warn); }
.note.error { background: var(--error-soft); color: var(--error); }
pre.hex { margin: 16px 0 0; padding: 12px; border-radius: 8px; background: var(--code-bg); font-size: 0.8rem; line-height: 1.5; overflow-x: auto; }
footer { margin-top: 32px; color: var(--muted); font-size: 0.85rem; }
@media (max-width: 520px) {
    dl { grid-template-columns: minmax(0, 1fr); gap: 2px; }
    dd { margin-bottom: 8px; }
}