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

:root {
    color-scheme: dark;
    --bg: #0f1114;
    --panel: #161a1f;
    --panel-2: #1f242b;
    --text: #f4f6f8;
    --muted: #a5b0bd;
    --accent: #7c5cff;
    --accent-2: #33d2c0;
    --border: #2a2f37;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    --radius: 18px;
}

body {
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at top, #1e2430 0%, #0f1114 40%);
    color: var(--text);
    min-height: 100vh;
}

a {
    color: inherit;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 8vw 16px;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    font-size: 2.4rem;
}

.brand h1 {
    font-size: 1.8rem;
    margin-bottom: 4px;
}

.brand p {
    color: var(--muted);
    font-size: 0.95rem;
}

.topbar-actions {
    display: flex;
    gap: 12px;
}

.container {
    padding: 0 8vw 64px;
    display: grid;
    gap: 28px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.panel.drag-active {
    border-color: var(--accent-2);
    box-shadow: 0 0 0 2px rgba(51, 210, 192, 0.3), var(--shadow);
}

.panel-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.panel-row h2 {
    font-size: 1.4rem;
}

.muted {
    color: var(--muted);
}

.panel-actions {
    display: flex;
    gap: 12px;
}

button {
    background: var(--accent);
    border: none;
    border-radius: 999px;
    padding: 10px 18px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 10px 24px rgba(124, 92, 255, 0.25);
}

button:hover {
    transform: translateY(-1px);
}

button.ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
}

.card {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.card img,
.card video {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.card-footer {
    padding: 12px;
    font-size: 0.85rem;
    color: var(--muted);
}

.auth-grid,
.upload-grid {
    display: grid;
    gap: 16px;
}

.auth-grid label,
.upload-grid label {
    display: grid;
    gap: 8px;
    color: var(--muted);
    font-size: 0.85rem;
}

input {
    background: #0d1116;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    color: var(--text);
}

.row {
    display: flex;
    gap: 12px;
}

.row input {
    flex: 1;
}

.auth-actions {
    display: flex;
    gap: 12px;
}

.hint {
    color: var(--muted);
    font-size: 0.85rem;
}

.viewer {
    border: none;
    padding: 0;
    background: rgba(5, 7, 10, 0.95);
    width: min(92vw, 900px);
    border-radius: 20px;
    overflow: hidden;
}

.viewer::backdrop {
    background: rgba(2, 3, 5, 0.85);
}

.viewer-body {
    display: grid;
    place-items: center;
    background: #0b0e12;
}

.viewer-body img {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
}

.viewer-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 18px;
    background: #12161b;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%);
    background: #12161b;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 10px 20px;
    color: var(--text);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(-6px);
}

@media (max-width: 720px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .row {
        flex-direction: column;
    }

    .viewer-actions {
        flex-direction: column;
    }
}