:root {
    color-scheme: light;
    --background: #f3f8f4;
    --surface: #ffffff;
    --inset: #f0f6f2;
    --border: #d1e1d7;
    --text: #183b2d;
    --muted: #566e61;
    --accent: #146c4b;
    --warning: #b64b3b;
    --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
    --ease: cubic-bezier(.2, .75, .25, 1);
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background: radial-gradient(ellipse at 73% 10%, #deefe2 0%, transparent 38rem), var(--background);
    font: 15px/1.6 "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

a { color: inherit; text-decoration: none; }
button, textarea, select { font: inherit; }
button, select { cursor: pointer; }
button:disabled, select:disabled { cursor: default; opacity: .58; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
::selection { background: var(--accent); color: #ffffff; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

.shell { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.icon {
    flex: none;
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.site-header { border-bottom: 1px solid var(--border); background: #ffffffb3; }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: inline-flex; gap: 12px; align-items: center; }
.brand-icon, .panel-icon { display: grid; flex: none; place-items: center; border-radius: 12px; }
.brand-icon { width: 38px; height: 38px; background: var(--accent); color: #ffffff; }
.brand-icon .icon { width: 24px; height: 24px; }
.brand-name { display: flex; gap: 12px; align-items: baseline; font-size: 18px; font-weight: 750; }
.help-link { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }
.help-link .icon { width: 16px; height: 16px; }
.help-link:hover { color: var(--accent); }

.panel {
    position: relative;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: linear-gradient(125deg, #f0f8f280, transparent 65%), var(--surface);
    box-shadow: 0 12px 36px #244d3510;
    animation: appear .65s .13s var(--ease) both;
}
.input-panel { margin-top: 20px; }
.output-panel { margin-top: 14px; animation-delay: .21s; }
.panel-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 17px; }
.panel-icon { width: 42px; height: 42px; color: var(--accent); background: #e9f5ed; border: 1px solid #c5dfcd; }
.panel-heading h1, .panel-heading h2 { margin: 0; font-size: 17px; line-height: 1.35; }
.panel-heading p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.input-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px;
    background: var(--inset);
    border: 1px solid var(--border);
    border-radius: 13px;
    transition: border-color .2s, box-shadow .2s;
}
.input-box:focus-within { border-color: #388c65; box-shadow: 0 0 0 3px #16765a13; }
.input-box textarea {
    flex: 1;
    width: 100%;
    min-width: 0;
    min-height: 56px;
    padding: 7px 8px;
    resize: vertical;
    color: var(--text);
    background: transparent;
    border: 0;
    outline: none;
}
.input-box textarea::placeholder { color: #708679; }
.form-actions { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 12px; }
.form-actions p, .notice { margin: 0; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.notice { margin-block: 0 12px; color: #906326; }
.button {
    display: inline-flex;
    flex: none;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 36px;
    padding: 7px 11px;
    border: 1px solid transparent;
    border-radius: 9px;
    font-size: 13px;
    font-weight: 650;
    white-space: nowrap;
    transition: background .2s, border-color .2s, box-shadow .2s, transform .2s var(--ease);
}
.button:not(:disabled):active { transform: translateY(1px); }
.button .icon { width: 16px; height: 16px; }
.button-quiet { color: #28513d; background: #edf6ef; border-color: #c9dfd0; }
.button-quiet:hover:not(:disabled) { background: #e0efe4; border-color: #9dc2aa; }
.button-primary {
    min-width: 141px;
    min-height: 44px;
    gap: 10px;
    padding-inline: 16px;
    color: #ffffff;
    background: linear-gradient(100deg, #23855b, #126c56);
    box-shadow: 0 4px 18px #16765a24;
}
.button-primary:hover:not(:disabled) { box-shadow: 0 4px 23px #16765a40; transform: translateY(-2px); }
.spinner { display: none; width: 14px; height: 14px; border: 2px solid #ffffff55; border-top-color: #ffffff; border-radius: 50%; }
.button-primary[aria-busy="true"] { opacity: .86; }
.button-primary[aria-busy="true"] .spinner { display: inline-block; animation: orbit .7s linear infinite; }
.button-primary[aria-busy="true"] .submit-arrow { display: none; }

.output-status {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 65px;
    overflow: hidden;
    padding: 10px 14px;
    border: 1px dashed #bbd0c1;
    border-radius: 12px;
    background: var(--inset);
}
.output-status strong { display: block; font-size: 13px; }
.output-status p { margin: 2px 0 0; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.status-marker {
    flex: none;
    width: 11px;
    height: 11px;
    border: 2px solid #7e9b8b;
    border-radius: 50%;
}
.output-panel[data-state="loading"] .output-status { border-color: #4c8a7a; }
.output-panel[data-state="loading"] .output-status::after {
    position: absolute;
    inset: 0 auto 0 0;
    width: 30%;
    background: linear-gradient(90deg, transparent, #16765a13, transparent);
    content: "";
    pointer-events: none;
    animation: scan 1.65s ease-in-out infinite;
}
.output-panel[data-state="loading"] .status-marker { border-color: var(--accent); animation: pulse .75s ease-in-out infinite alternate; }
.output-panel[data-state="success"] .output-status { border-color: #a3c8ae; }
.output-panel[data-state="success"] .status-marker { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 12px #3c9e7240; }
.output-panel[data-state="error"] .output-status { border-color: #d7a294; }
.output-panel[data-state="error"] .status-marker { border-color: var(--warning); }

.media-result { margin-top: 18px; padding-bottom: 80px; animation: appear .42s var(--ease) both; }
.music-panel { padding: 14px; border: 1px solid var(--border); border-radius: 13px; background: #f7fbf8; }
.music-panel h3 { margin: 0 0 12px; font-size: 14px; }
.music-summary { display: flex; align-items: center; gap: 12px; }
.music-cover { flex: none; width: 64px; height: 64px; object-fit: cover; border-radius: 9px; }
.music-info { min-width: 0; }
.music-info h4 { margin: 0; font-size: 15px; overflow-wrap: anywhere; }
.music-info p { margin: 4px 0 0; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.music-panel audio { display: block; width: 100%; margin-top: 14px; }
.music-panel > .preview-message { padding: 12px 0 0; }
.media-panels { margin-top: 18px; }
.media-tab-panel { scroll-margin-top: 18px; }
.media-tabs { position: fixed; z-index: 20; bottom: max(16px, env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 6px; width: min(620px, calc(100% - 32px)); padding: 7px; border: 1px solid #c0d7c8; border-radius: 17px; background: #fffffff5; box-shadow: 0 8px 35px #2a594328; backdrop-filter: blur(16px); }
.media-tab { display: flex; justify-content: center; align-items: center; gap: 7px; min-width: 0; min-height: 48px; padding: 8px; border: 1px solid transparent; border-radius: 11px; color: var(--muted); background: transparent; font: inherit; font-size: 14px; }
.media-tab:hover { background: #f0f8f2; color: var(--text); }
.media-tab[aria-selected="true"] { color: var(--accent); background: #dff2e5; border-color: #a7d0b4; }
.media-tab .media-count { background: #edf6ef; color: inherit; }
.media-preview { position: relative; overflow: hidden; border: 1px solid var(--border); border-radius: 13px; background: var(--inset); }
.media-preview > video, .media-preview > img {
    display: block;
    width: 100%;
    max-height: 410px;
    aspect-ratio: 16 / 9;
    object-fit: contain;
}
.preview-message { margin: 0; padding: 14px; color: var(--muted); font-size: 13px; }
.result-tags, .result-actions, .part-picker { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.result-tags span { padding: 3px 8px; border: 1px solid #c5dfcd; border-radius: 6px; color: var(--accent); background: #e8f5ec; font-size: 11px; }
.result-details { min-width: 0; }
.result-details h3 { margin: 8px 0 4px; font-size: 20px; line-height: 1.45; overflow-wrap: anywhere; }
.result-details p { margin: 6px 0; color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
.result-details .description { margin-top: 10px; white-space: pre-wrap; }
.result-actions, .part-picker { margin-top: 13px; }
.part-picker label { color: var(--muted); font-size: 13px; }
.part-picker select { min-height: 36px; max-width: 100%; padding: 5px 8px; color: var(--text); background: var(--inset); border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.media-count { min-width: 24px; padding: 1px 7px; border-radius: 6px; background: #e8f5ec; color: var(--accent); font: 12px/1.6 var(--mono); text-align: center; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 12px; }
.gallery figure { min-width: 0; margin: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 11px; background: var(--inset); }
.gallery .media-preview { border: 0; border-radius: 0; }
.gallery-image { display: block; }
.gallery-image:focus-visible { outline-offset: -3px; }
.gallery img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.gallery figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px; padding: 8px; color: var(--muted); font-size: 12px; }
.gallery figcaption a { color: var(--accent); }
.media-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: stretch; gap: 6px; width: 100%; margin-top: 10px; }
.gallery .media-actions { margin: 0; padding: 8px; border-top: 1px solid var(--border); }
.media-actions .button { width: 100%; min-width: 0; min-height: 34px; padding: 6px 3px; font-size: clamp(10px, 2.9vw, 12px); }
.media-action-status { grid-column: 1 / -1; color: var(--accent); font-size: 12px; }
.media-action-status:empty { display: none; }
.video-content > .result-actions { display: grid; align-items: start; }
.video-alternate p { margin: 8px 0; color: var(--muted); font-size: 13px; }

.site-footer { display: flex; justify-content: space-between; gap: 18px; padding-block: 19px 100px; color: var(--muted); font-size: 12px; }
.site-footer p { margin: 0; }
.site-footer strong { margin-right: 7px; color: #35594a; }
.site-footer:target strong { color: var(--accent); }

@keyframes appear { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes pulse { from { opacity: .55; } to { opacity: 1; } }
@keyframes scan { from { transform: translateX(-105%); } to { transform: translateX(340%); } }

@media (max-width: 760px) {
    .shell { width: calc(100% - 32px); }
    .header-inner { min-height: 60px; }
    .input-panel { margin-top: 14px; }
    .panel { padding: 15px; border-radius: 15px; }
    .panel-heading { margin-bottom: 12px; }
    .input-box { gap: 4px; padding: 7px; }
    .input-box textarea { padding-inline: 5px; font-size: 16px; }
    .form-actions { gap: 8px; }
    .button-primary { min-width: 120px; padding-inline: 11px; }
    .media-tabs { gap: 3px; padding: 5px; }
    .media-tab { gap: 3px; padding: 6px 1px; font-size: 12px; }
    .media-tab .media-count { min-width: 18px; padding-inline: 2px; font-size: 10px; }
    .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .site-footer { flex-direction: column; gap: 6px; }
}

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