body {
            min-height: 100vh;
            background: var(--color-bg);
            color: var(--color-text);
        }

        [hidden] {
            display: none !important;
        }

        .background-shell {
            overflow-x: hidden;
        }

        .sample-hero {
            padding: 72px 0 54px;
            background: radial-gradient(circle at top, rgba(0, 140, 255, 0.24), var(--color-bg));
        }

        #gallery-section,
        #submission-section {
            scroll-margin-top: 110px;
        }

        .sample-hero-inner {
            display: grid;
            grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
            gap: 24px;
            align-items: start;
        }

        .hero-card {
            display: grid;
            gap: 14px;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 12px;
        }

        .metric {
            padding: 14px;
            border-radius: var(--radius-m);
            border: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.04);
        }

        .metric-value {
            display: block;
            font-size: 1.45rem;
            font-weight: 700;
            color: #f8fafc;
        }

        .metric-label {
            display: block;
            margin-top: 4px;
            color: var(--color-text-soft);
            font-size: 0.88rem;
        }

        .notice {
            padding: 14px 16px;
            border-left: 4px solid #22d3ee;
            background: rgba(15, 23, 42, 0.76);
            border-radius: 12px;
            color: var(--color-text-soft);
        }

        .hero-note-wide {
            color: var(--color-text-soft);
            max-width: 720px;
        }

        .gallery-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: end;
            gap: 16px;
            flex-wrap: wrap;
        }

        .gallery-title {
            margin: 0;
        }

        .gallery-summary {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            padding: 8px 12px;
            border-radius: 999px;
            border: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.04);
        }

        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .filter-btn {
            border: 1px solid var(--color-border-strong);
            background: rgba(255, 255, 255, 0.04);
            color: var(--color-text-soft);
            border-radius: 999px;
            padding: 10px 14px;
            cursor: pointer;
            transition: 0.25s;
            font-weight: 600;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: linear-gradient(135deg, var(--color-blue), var(--color-purple));
            color: #fff;
            border-color: transparent;
            transform: translateY(-1px);
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 20px;
        }

        .sample-card {
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sample-thumb {
            aspect-ratio: 4 / 3;
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid var(--color-border);
            background: #020617;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
        }

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

        .sample-desc {
            color: var(--color-text-soft);
            font-size: 0.94rem;
            min-height: 3.8em;
        }

        .sample-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            padding: 5px 10px;
            border-radius: 999px;
            border: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.05);
            font-size: 0.78rem;
            color: var(--color-text-soft);
        }

        .sample-actions {
            margin-top: auto;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .viewer-overlay {
            position: fixed;
            inset: 0;
            z-index: 50;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 24px;
            background: rgba(2, 6, 23, 0.82);
            backdrop-filter: blur(10px);
        }

        .viewer-overlay.open {
            display: flex;
        }

        .viewer-dialog {
            width: min(100%, 1040px);
            max-height: min(92vh, 920px);
            display: grid;
            grid-template-rows: auto 1fr auto;
            gap: 16px;
            padding: 18px;
            border-radius: 24px;
            border: 1px solid var(--color-border);
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(2, 6, 23, 0.98));
            box-shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
        }

        .viewer-header {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            align-items: start;
            flex-wrap: wrap;
        }

        .viewer-title {
            margin: 0;
            font-size: 1.15rem;
        }

        .viewer-close {
            border: 1px solid var(--color-border-strong);
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
            border-radius: 999px;
            padding: 10px 14px;
            cursor: pointer;
        }

        .viewer-stage {
            display: grid;
            grid-template-columns: 64px minmax(0, 1fr) 64px;
            gap: 14px;
            align-items: center;
            min-height: 0;
        }

        .viewer-nav {
            width: 64px;
            height: 64px;
            border-radius: 999px;
            border: 1px solid var(--color-border-strong);
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
            font-size: 1.2rem;
            cursor: pointer;
        }

        .viewer-nav:hover {
            background: linear-gradient(135deg, var(--color-blue), var(--color-purple));
        }

        .viewer-media {
            display: grid;
            gap: 14px;
            min-width: 0;
        }

        .viewer-frame {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--color-border);
            background: #020617;
            aspect-ratio: 16 / 10;
        }

        .viewer-frame img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            display: block;
            background: radial-gradient(circle at center, rgba(37, 99, 235, 0.14), transparent 55%);
        }

        .viewer-caption {
            display: grid;
            gap: 10px;
        }

        .viewer-counter {
            color: var(--color-text-soft);
            font-size: 0.9rem;
        }

        .viewer-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .viewer-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }

        .viewer-caption p {
            margin: 0;
            color: var(--color-text-soft);
        }

        @media (max-width: 780px) {
            .viewer-overlay {
                padding: 12px;
            }

            .viewer-dialog {
                padding: 14px;
            }

            .viewer-stage {
                grid-template-columns: 1fr;
            }

            .viewer-nav {
                width: 100%;
                height: 48px;
            }
        }

        .submission-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
            gap: 20px;
        }

        .field {
            display: grid;
            gap: 6px;
            margin-bottom: 14px;
        }

        .field label {
            font-weight: 600;
            color: #f8fafc;
        }

        .field input,
        .field select,
        .field textarea {
            width: 100%;
            border-radius: 12px;
            border: 1px solid var(--color-border-strong);
            background: #0f172a;
            color: var(--color-text);
            padding: 12px 14px;
            font: inherit;
        }

        .field textarea {
            min-height: 110px;
            resize: vertical;
        }

        .field input[type="file"] {
            padding: 10px;
        }

        .status {
            min-height: 1.4em;
            margin-top: 12px;
            color: var(--color-text-soft);
        }

        .file-help {
            color: var(--color-text-soft);
        }

        .submission-list {
            margin: 16px 0 0;
            padding-left: 20px;
            color: var(--color-text-soft);
        }

        .inline-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        @media (max-width: 980px) {
            .sample-hero-inner,
            .submission-grid {
                grid-template-columns: 1fr;
            }

            .metric-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        @media (max-width: 640px) {
            .metric-grid {
                grid-template-columns: 1fr;
            }
        }