:root {
    --sl-accent: #2563eb;
    --sl-accent2: #0ea5e9;
    --sl-green: #10b981;
    --sl-yellow: #f59e0b;
    --sl-red: #ef4444;
    --sl-purple: #8b5cf6;
    --sl-bg: var(--bg1, #0d1117);
    --sl-bg2: var(--bg2, #161b22);
    --sl-bg3: var(--bg3, #1c2333);
    --sl-line: var(--line, rgba(255,255,255,.08));
    --sl-line2: var(--line2, rgba(255,255,255,.13));
    --sl-t1: var(--t1, #f0f6fc);
    --sl-t2: var(--t2, #c9d1d9);
    --sl-t3: var(--t3, #8b949e);
    --sl-r: 10px;
    --sl-r-sm: 7px;
    --sl-r-lg: 14px;
    --sl-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --sl-shadow: 0 4px 24px rgba(0,0,0,.35);
    --sl-shadow-sm: 0 2px 10px rgba(0,0,0,.25);
}

/* ═══════════════════════════════════════════════
   PAGE SHELL
═══════════════════════════════════════════════ */
.db-page {
    max-width: 980px;
    margin: 0 auto;
    padding: 28px 20px 80px;
}

/* ═══════════════════════════════════════════════
   PAGE HEADER
═══════════════════════════════════════════════ */
.db-header {
    margin-bottom: 24px;
}

.db-header-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--sl-t1);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

    .db-header-title i {
        color: var(--sl-accent2);
    }

.db-header-sub {
    font-size: 13px;
    color: var(--sl-t3);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ═══════════════════════════════════════════════
   LAYOUT GRID
═══════════════════════════════════════════════ */
.db-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 20px;
    align-items: start;
}

/* ═══════════════════════════════════════════════
   CARDS
═══════════════════════════════════════════════ */
.sl-card {
    background: var(--sl-bg2);
    border: 1px solid var(--sl-line);
    border-radius: var(--sl-r);
    overflow: hidden;
    margin-bottom: 16px;
    box-shadow: var(--sl-shadow-sm);
    transition: border-color .2s;
}

    .sl-card:last-child {
        margin-bottom: 0;
    }

    .sl-card:hover {
        border-color: var(--sl-line2);
    }

.sl-card-hd {
    padding: 13px 18px;
    border-bottom: 1px solid var(--sl-line);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sl-card-hd-ico {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}

.ico-blue {
    background: rgba(37,99,235,.15);
    color: var(--sl-accent2);
}

.ico-green {
    background: rgba(16,185,129,.14);
    color: var(--sl-green);
}

.ico-yellow {
    background: rgba(245,158,11,.14);
    color: var(--sl-yellow);
}

.ico-purple {
    background: rgba(139,92,246,.14);
    color: var(--sl-purple);
}

.ico-cyan {
    background: rgba(14,165,233,.14);
    color: #38bdf8;
}

.ico-red {
    background: rgba(239,68,68,.12);
    color: var(--sl-red);
}

.sl-card-title {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--sl-t1);
}

.sl-card-sub {
    font-size: 11px;
    color: var(--sl-t3);
    margin-top: 1px;
}

.sl-card-bd {
    padding: 18px;
}

.sl-card-ft {
    padding: 12px 18px;
    border-top: 1px solid var(--sl-line);
    background: rgba(255,255,255,.01);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
}

/* ═══════════════════════════════════════════════
   FORM ELEMENTS
═══════════════════════════════════════════════ */
.pf-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

    .pf-group:last-child {
        margin-bottom: 0;
    }

.pf-label {
    font-size: 11.5px;
    font-weight: 600;
    color: var(--sl-t2);
    display: flex;
    align-items: center;
    gap: 5px;
}

    .pf-label i {
        color: var(--sl-t3);
        font-size: 10px;
    }

.pf-req {
    color: var(--sl-red);
}

.pf-input {
    background: var(--sl-bg3);
    border: 1px solid var(--sl-line);
    border-radius: var(--sl-r-sm);
    padding: 9px 12px;
    color: var(--sl-t1);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color .18s, box-shadow .18s, background .18s;
    width: 100%;
    box-sizing: border-box;
}

    .pf-input:focus {
        border-color: var(--sl-accent);
        box-shadow: 0 0 0 3px rgba(37,99,235,.14);
        background: var(--sl-bg2);
    }

    .pf-input::placeholder {
        color: var(--sl-t3);
    }

select.pf-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.pf-input {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

.pf-hint {
    font-size: 11px;
    color: var(--sl-t3);
    line-height: 1.5;
}

.pf-input-wrap {
    position: relative;
}

.pf-input-suffix {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11.5px;
    color: var(--sl-t3);
    font-weight: 500;
    pointer-events: none;
}

/* Price highlight */
.price-info {
    margin-top: 6px;
    padding: 8px 12px;
    background: rgba(16,185,129,.07);
    border: 1px solid rgba(16,185,129,.14);
    border-radius: var(--sl-r-sm);
    font-size: 12px;
    color: var(--sl-t3);
    display: flex;
    align-items: center;
    gap: 6px;
}

    .price-info strong {
        color: var(--sl-green);
    }

#sellerNhan {
    font-family: var(--sl-mono);
    color: var(--sl-green);
    font-weight: 700;
}

/* ═══════════════════════════════════════════════
   UPLOAD ZONES
═══════════════════════════════════════════════ */
.upload-zone {
    border: 1.5px dashed var(--sl-line2);
    border-radius: var(--sl-r);
    padding: 26px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .18s, background .18s;
    background: var(--sl-bg3);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

    .upload-zone:hover,
    .upload-zone.dragover {
        border-color: var(--sl-accent);
        background: rgba(37,99,235,.04);
    }

    .upload-zone.has-file {
        border-color: var(--sl-green);
        background: rgba(16,185,129,.04);
    }

.upload-zone-ico {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 4px;
}

    .upload-zone-ico.zip {
        background: rgba(245,158,11,.12);
        color: var(--sl-yellow);
    }

    .upload-zone-ico.img {
        background: rgba(14,165,233,.12);
        color: #38bdf8;
    }

    .upload-zone-ico.imgs {
        background: rgba(139,92,246,.12);
        color: var(--sl-purple);
    }

.upload-zone-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--sl-t1);
}

.upload-zone-sub {
    font-size: 11px;
    color: var(--sl-t3);
}

/* File info pill */
.file-info-pill {
    display: none;
    margin-top: 10px;
    padding: 8px 12px;
    background: rgba(16,185,129,.08);
    border: 1px solid rgba(16,185,129,.18);
    border-radius: var(--sl-r-sm);
    font-size: 12px;
    color: var(--sl-green);
    align-items: center;
    gap: 7px;
}

    .file-info-pill.show {
        display: flex;
    }

/* Cover preview */
.cover-preview {
    display: none;
    margin-top: 10px;
    border-radius: var(--sl-r-sm);
    overflow: hidden;
    border: 1px solid var(--sl-line);
    position: relative;
}

    .cover-preview img {
        width: 100%;
        display: block;
    }

.cover-preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.0);
    transition: background .18s;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 8px;
}

.cover-preview:hover .cover-preview-overlay {
    background: rgba(0,0,0,.3);
}

.cover-preview-badge {
    background: rgba(0,0,0,.65);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    padding: 3px 9px;
    border-radius: 20px;
    letter-spacing: .3px;
    display: flex;
    align-items: center;
    gap: 4px;
    backdrop-filter: blur(4px);
}

.cover-preview-actions {
    display: flex;
    gap: 5px;
}

.cover-action-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    backdrop-filter: blur(4px);
    transition: all .15s;
}

    .cover-action-btn.change {
        background: rgba(37,99,235,.8);
        color: #fff;
    }

        .cover-action-btn.change:hover {
            background: rgba(37,99,235,1);
        }

    .cover-action-btn.remove {
        background: rgba(239,68,68,.85);
        color: #fff;
    }

        .cover-action-btn.remove:hover {
            background: rgba(239,68,68,1);
        }

/* ── Demo image grid ── */
.demo-grid {
    display: none;
    margin-top: 12px;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 8px;
}

    .demo-grid.show {
        display: grid;
    }

.demo-thumb {
    position: relative;
    border-radius: var(--sl-r-sm);
    overflow: hidden;
    border: 1px solid var(--sl-line);
    aspect-ratio: 1 / 1;
    background: var(--sl-bg3);
    transition: border-color .15s;
}

    .demo-thumb:hover {
        border-color: var(--sl-line2);
    }

    .demo-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }

.demo-thumb-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.0);
    transition: background .15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-thumb:hover .demo-thumb-overlay {
    background: rgba(0,0,0,.45);
}

.demo-thumb-rm {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(239,68,68,.9);
    border: 2px solid rgba(255,255,255,.3);
    color: #fff;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(.8);
    transition: opacity .15s, transform .15s;
}

.demo-thumb:hover .demo-thumb-rm {
    opacity: 1;
    transform: scale(1);
}

.demo-thumb-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,.75));
    color: #fff;
    font-size: 9px;
    padding: 14px 5px 4px;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.2;
}

/* Demo count badge */
.demo-count-bar {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 10px;
    padding: 8px 12px;
    background: rgba(139,92,246,.08);
    border: 1px solid rgba(139,92,246,.18);
    border-radius: var(--sl-r-sm);
    font-size: 12px;
    color: var(--sl-purple);
}

    .demo-count-bar.show {
        display: flex;
    }

    .demo-count-bar strong {
        font-family: var(--sl-mono);
        font-size: 14px;
    }

.demo-add-more {
    background: rgba(139,92,246,.15);
    border: 1px solid rgba(139,92,246,.25);
    border-radius: var(--sl-r-sm);
    color: var(--sl-purple);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    cursor: pointer;
    transition: background .15s;
    display: flex;
    align-items: center;
    gap: 5px;
}

    .demo-add-more:hover {
        background: rgba(139,92,246,.28);
    }

@media (max-width: 600px) {
    .demo-grid {
        grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
        gap: 6px;
    }

    /* Show remove button always on touch */
    .demo-thumb-rm {
        opacity: 1;
        transform: scale(1);
    }

    .demo-thumb-overlay {
        background: rgba(0,0,0,.15);
    }
}

/* ═══════════════════════════════════════════════
   TAG SYSTEM
═══════════════════════════════════════════════ */
.tag-input-wrap {
    background: var(--sl-bg3);
    border: 1px solid var(--sl-line);
    border-radius: var(--sl-r-sm);
    padding: 7px 10px;
    min-height: 44px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    cursor: text;
    transition: border-color .18s, box-shadow .18s;
}

    .tag-input-wrap:focus-within {
        border-color: var(--sl-accent);
        box-shadow: 0 0 0 3px rgba(37,99,235,.14);
    }

.tag-chip {
    background: rgba(37,99,235,.14);
    color: var(--sl-accent2);
    border: 1px solid rgba(37,99,235,.24);
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 11.5px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

    .tag-chip button {
        background: none;
        border: none;
        cursor: pointer;
        color: var(--sl-accent2);
        padding: 0;
        line-height: 1;
        font-size: 10px;
        opacity: .7;
        transition: opacity .15s;
    }

        .tag-chip button:hover {
            opacity: 1;
        }

.tag-input-wrap input {
    border: none;
    background: transparent;
    outline: none;
    color: var(--sl-t1);
    font-size: 13px;
    min-width: 100px;
    flex: 1;
    padding: 2px 4px;
}

    .tag-input-wrap input::placeholder {
        color: var(--sl-t3);
    }

.tag-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.tag-sug-btn {
    background: var(--sl-bg3);
    border: 1px solid var(--sl-line2);
    border-radius: 20px;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 500;
    color: var(--sl-t3);
    cursor: pointer;
    transition: all .15s;
}

    .tag-sug-btn:hover {
        border-color: var(--sl-accent);
        color: var(--sl-accent2);
        background: rgba(37,99,235,.06);
    }

/* ═══════════════════════════════════════════════
   VALIDATION
═══════════════════════════════════════════════ */
.field-error {
    font-size: 11px;
    color: var(--sl-red);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE — TABLET (≤ 960px)
═══════════════════════════════════════════════ */
@media (max-width: 960px) {
    .db-layout {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Right column (uploads) comes first visually on mobile */
    .db-col-right {
        order: -1;
    }
}

/* ═══════════════════════════════════════════════
   RESPONSIVE — MOBILE (≤ 600px)
═══════════════════════════════════════════════ */
@media (max-width: 600px) {
    .db-page {
        padding: 14px 12px 60px;
    }

    .db-header-title {
        font-size: 17px;
    }

    .sl-card-hd {
        padding: 11px 14px;
    }

    .sl-card-bd {
        padding: 14px;
    }

    .sl-card-ft {
        padding: 10px 14px;
    }

    .upload-zone {
        padding: 20px 14px;
    }

    .sl-card-ft .btn {
        flex: 1;
        justify-content: center;
    }
}