* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #ffffff;
    --bg-card: #f6f8fa;
    --bg-hover: #eef0f4;
    --border: #d0d7de;
    --text: #1f2328;
    --text-dim: #656d76;
    --accent: #0969da;
    --accent-hover: #0550ae;
    --danger: #cf222e;
    --green: #1a7f37;
    --orange: #bf8700;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 32px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-dim);
    font-size: 0.95rem;
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
}

/* Toolbar */
.toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
}

#search {
    flex: 1;
    min-width: 200px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

#search:focus {
    border-color: var(--accent);
}

#search::placeholder {
    color: var(--text-dim);
}

.stats {
    color: var(--text-dim);
    font-size: 0.85rem;
    white-space: nowrap;
}

/* File List */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.loading, .empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-dim);
    font-size: 1rem;
}

/* File Card */
.file-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: all 0.15s ease;
    text-decoration: none;
    color: var(--text);
}

.file-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    transform: translateX(2px);
}

.file-icon {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.file-icon.jar  { background: #f59e0b20; }
.file-icon.zip  { background: #8b5cf620; }
.file-icon.exe  { background: #3b82f620; }
.file-icon.pdf  { background: #ef444420; }
.file-icon.img  { background: #10b98120; }
.file-icon.other{ background: #6b728020; }

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-dim);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.file-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.file-desc {
    font-size: 0.82rem;
    color: var(--text-dim);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 7px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    flex-shrink: 0;
    text-decoration: none;
}

.dl-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.03);
}

.dl-btn:active {
    transform: scale(0.97);
}

/* Section title */
.section-title {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 16px 0 8px 4px;
}

/* Package Card */
.pkg-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.pkg-card:hover {
    border-color: var(--accent);
}

.pkg-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    cursor: pointer;
    user-select: none;
}

.pkg-header:hover {
    background: var(--bg-hover);
}

.pkg-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.pkg-info {
    flex: 1;
    min-width: 0;
}

.pkg-name {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.pkg-meta {
    font-size: 0.8rem;
    color: var(--text-dim);
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 2px;
}

.pkg-desc {
    font-size: 0.82rem;
    color: var(--text-dim);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pkg-toggle {
    font-size: 1.2rem;
    color: var(--text-dim);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.pkg-card.open .pkg-toggle {
    transform: rotate(90deg);
}

.pkg-card.open .pkg-header {
    border-bottom: 1px solid var(--border);
}

/* Parts section */
.pkg-parts {
    display: none;
    padding: 12px 18px 16px;
}

.pkg-card.open .pkg-parts {
    display: block;
}

/* URL package (direct download) */
.pkg-card.url-pkg .pkg-header {
    cursor: default;
}

.pkg-card.url-pkg .pkg-header:hover {
    background: var(--bg-card);
}

.pkg-notes {
    font-size: 0.8rem;
    color: var(--orange);
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.merge-hint {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f0f2f5;
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 10px 14px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.merge-cmd {
    flex: 1;
    min-width: 0;
}

.merge-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    display: block;
    margin-bottom: 4px;
}

.merge-cmd code {
    font-size: 0.75rem;
    color: var(--orange);
    word-break: break-all;
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
}

.copy-btn {
    padding: 6px 14px;
    background: var(--border);
    color: var(--text);
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background 0.15s;
}

.copy-btn:hover {
    background: #475569;
}

/* Parts grid */
.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 6px;
}

.part-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.15s;
    font-size: 0.82rem;
}

.part-item:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.part-num {
    color: var(--text-dim);
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
    font-size: 0.75rem;
    min-width: 24px;
}

.part-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
    font-size: 0.78rem;
}

.part-dl {
    color: var(--accent);
    flex-shrink: 0;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 20px 12px 12px;
    }
    header h1 {
        font-size: 1.5rem;
    }
    .file-card {
        padding: 12px 14px;
        gap: 10px;
    }
    .file-icon {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
    .file-meta {
        gap: 8px;
        font-size: 0.75rem;
    }
    .dl-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    .pkg-header {
        padding: 12px 14px;
        gap: 10px;
    }
    .pkg-name {
        font-size: 0.95rem;
    }
    .pkg-meta {
        gap: 8px;
        font-size: 0.75rem;
    }
    .parts-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--text-dim);
    font-size: 0.8rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Copy link toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--green);
    color: #fff;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 1000;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2s forwards;
    pointer-events: none;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}