:root {
    --bg: #f6f5fb;
    --card: #ffffff;
    --ink: #17141f;
    --muted: #6b6780;
    --line: #e4e1ef;
    --field: #f1effa;
    --accent: #8b5cf6;
    --accent-2: #ec4899;
    --ok: #16a34a;
    --bad: #dc2626;
    --shadow: 0 1px 2px rgb(23 20 31 / .05), 0 24px 60px -24px rgb(90 60 180 / .3);
    --grad: linear-gradient(135deg, var(--accent), var(--accent-2));
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b0a10;
        --card: #14121c;
        --ink: #f3f1fa;
        --muted: #9a96b0;
        --line: #26233a;
        --field: #1b1828;
        --ok: #4ade80;
        --bad: #f87171;
        --shadow: 0 1px 2px rgb(0 0 0 / .4), 0 30px 70px -30px rgb(139 92 246 / .35);
    }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

.sprite { position: absolute; }

/* soft aurora behind the card */
.glow {
    position: fixed;
    inset: -20% -10% auto;
    height: 60vh;
    background:
        radial-gradient(40% 60% at 25% 30%, rgb(139 92 246 / .25), transparent 70%),
        radial-gradient(40% 60% at 75% 20%, rgb(236 72 153 / .2), transparent 70%);
    filter: blur(40px);
    pointer-events: none;
    animation: drift 18s ease-in-out infinite alternate;
}

@keyframes drift { to { transform: translate3d(3%, 6%, 0) scale(1.08); } }

.wrap {
    position: relative;
    max-width: 640px;
    margin: 0 auto;
    padding: clamp(32px, 9vh, 96px) 16px 48px;
}

.brand { display: flex; align-items: center; justify-content: center; gap: 12px; }
.logo { width: 40px; height: 40px; }
h1 { margin: 0; font-size: 1.9rem; letter-spacing: -.03em; }
.tagline { margin: 8px 0 28px; text-align: center; color: var(--muted); }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 18px;
    box-shadow: var(--shadow);
}

/* link field */
.field {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px 6px 14px;
    background: var(--field);
    border: 2px solid transparent;
    border-radius: 14px;
    transition: border-color .15s, box-shadow .15s;
}
.field:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px rgb(139 92 246 / .15); }
.field .icon { flex: none; width: 20px; height: 20px; color: var(--muted); }
.field input {
    flex: 1;
    min-width: 0;
    padding: 12px 0;
    border: 0;
    outline: 0;
    background: none;
    color: inherit;
    font: inherit;
    text-overflow: ellipsis;
}
.field input::placeholder { color: var(--muted); opacity: .7; }

.ghost {
    flex: none;
    padding: 8px 12px;
    border: 0;
    border-radius: 10px;
    background: var(--card);
    color: var(--ink);
    font: inherit;
    font-size: .875rem;
    font-weight: 600;
    cursor: pointer;
}
.ghost:hover { background: var(--line); }

.notice {
    margin: 12px 2px 0;
    padding: 10px 14px;
    border-radius: 12px;
    background: rgb(220 38 38 / .1);
    color: var(--bad);
    font-size: .9rem;
}

/* loading skeleton */
.skeleton { display: flex; gap: 14px; margin-top: 18px; }
.sk-thumb, .sk-lines i {
    background: linear-gradient(100deg, var(--field) 30%, var(--line) 50%, var(--field) 70%) 0 0 / 300% 100%;
    animation: shimmer 1.3s linear infinite;
    border-radius: 12px;
}
.sk-thumb { flex: none; width: 168px; aspect-ratio: 16 / 9; }
.sk-lines { flex: 1; display: grid; gap: 10px; align-content: center; }
.sk-lines i { height: 14px; }
.sk-lines i:last-child { width: 55%; }
@keyframes shimmer { to { background-position: -300% 0; } }

/* preview */
#result { margin-top: 18px; animation: rise .35s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

.preview { display: flex; gap: 14px; align-items: center; }
.preview img {
    flex: none;
    width: 168px;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 12px;
    background: var(--field);
}
.meta { min-width: 0; }
.meta h2 {
    margin: 0;
    font-size: 1rem;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.meta p { margin: 4px 0 0; color: var(--muted); font-size: .85rem; }

/* format tabs */
.tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    margin: 18px 0 14px;
    padding: 4px;
    background: var(--field);
    border-radius: 12px;
}
.tabs button {
    padding: 9px;
    border: 0;
    border-radius: 9px;
    background: none;
    color: var(--muted);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.tabs button[aria-selected="true"] { background: var(--card); color: var(--ink); box-shadow: 0 1px 3px rgb(0 0 0 / .12); }

/* resolution chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
    padding: 8px 14px;
    border: 1.5px solid var(--line);
    border-radius: 999px;
    background: none;
    color: var(--ink);
    font: inherit;
    font-weight: 600;
    font-size: .9rem;
    cursor: pointer;
    transition: border-color .15s, background .15s;
}
.chip small { margin-left: 6px; color: var(--muted); font-weight: 500; }
.chip:hover { border-color: var(--accent); }
.chip[aria-checked="true"] { border-color: var(--accent); background: rgb(139 92 246 / .12); }

.hint { margin: 2px 0 0; color: var(--muted); font-size: .9rem; }

/* the big button doubles as the progress bar */
.primary {
    position: relative;
    display: block;
    width: 100%;
    margin-top: 18px;
    padding: 16px;
    overflow: hidden;
    border: 0;
    border-radius: 14px;
    background: var(--grad);
    color: #fff;
    font: inherit;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform .1s, filter .15s, box-shadow .15s;
    box-shadow: 0 10px 24px -10px rgb(236 72 153 / .7);
}
.primary:hover { filter: brightness(1.07); }
.primary:active { transform: scale(.985); }
.primary .label { position: relative; }
.primary .size { white-space: nowrap; opacity: .85; font-weight: 600; }
.primary .bar { position: absolute; inset: 0 auto 0 0; width: 0; background: rgb(255 255 255 / .22); transition: width .4s ease; }
.primary.busy { cursor: progress; background: #2a2540; box-shadow: none; filter: none; }
.primary.busy .bar { background: var(--grad); }
.primary.indeterminate .bar { width: 35% !important; animation: slide 1.1s ease-in-out infinite alternate; }
@keyframes slide { from { transform: translateX(0); } to { transform: translateX(185%); } }
.primary.done { background: var(--ok); box-shadow: none; }

.status { min-height: 1.4em; margin: 10px 0 0; text-align: center; color: var(--muted); font-size: .875rem; }
.status b { color: var(--ink); font-variant-numeric: tabular-nums; }

/* recent files */
.files { margin-top: 26px; }
.files h3 { margin: 0 4px 10px; color: var(--muted); font-size: .8rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.files ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
.files li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    animation: rise .3s ease both;
}
.files .badge {
    flex: none;
    min-width: 46px;
    padding: 3px 0;
    border-radius: 8px;
    background: rgb(139 92 246 / .14);
    color: var(--accent);
    font-size: .75rem;
    font-weight: 700;
    text-align: center;
}
.files .name { flex: 1; min-width: 0; }
.files .name span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; font-size: .9rem; }
.files .name small { color: var(--muted); font-variant-numeric: tabular-nums; }
.files a, .files button {
    flex: none;
    padding: 7px 12px;
    border: 0;
    border-radius: 9px;
    font: inherit;
    font-size: .85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}
.files a { background: var(--grad); color: #fff; }
.files button { background: var(--field); color: var(--muted); }
.files button:hover { color: var(--bad); }

footer { margin-top: 36px; text-align: center; color: var(--muted); font-size: .85rem; }
footer p { margin: 4px 0; }
footer .fine { font-size: .78rem; opacity: .75; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

@media (max-width: 520px) {
    .preview, .skeleton { flex-direction: column; align-items: stretch; }
    .preview img, .sk-thumb { width: 100%; }
    .files li { flex-wrap: wrap; }
    .files .name { flex: 1 1 calc(100% - 64px); }
    .files a, .files button { flex: 1; padding: 9px 12px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}