body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Open Sans', sans-serif;
    background: radial-gradient(circle at top right, rgba(230, 182, 92, 0.22), transparent 22%), linear-gradient(135deg, #0c1117, #162330 55%, #0d0f14 100%);
    color: #f7f1e7;
}

a {
    color: #f3d389;
    text-decoration: none;
}

a:hover {
    color: #ffdf98;
}

.backend-shell {
    max-width: 1120px;
    margin: 0 auto;
    padding: 32px 18px 80px;
}

.backend-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    margin-bottom: 26px;
}

.backend-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.backend-brand img,
.avatar-preview,
.profile-avatar {
    width: 58px;
    height: 58px;
    border-radius: 999px;
    object-fit: cover;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.profile-avatar.large {
    width: 86px;
    height: 86px;
    border-radius: 999px;
}

.avatar-preview-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 10px;
}

.avatar-preview.large {
    width: 96px;
    height: 96px;
}

.backend-brand strong {
    display: block;
    font-size: 22px;
    letter-spacing: 1.5px;
}

.backend-brand span,
.muted {
    color: rgba(255, 255, 255, 0.68);
    font-size: 13px;
}

.backend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.backend-mobile-toggle {
    display: none;
    border: 0;
    border-radius: 14px;
    background: rgba(255,255,255,0.08);
    color: #fff;
    width: 46px;
    height: 46px;
    font-size: 24px;
    line-height: 1;
}

.backend-card {
    background: rgba(13, 18, 24, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 28px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(10px);
}

.backend-card + .backend-card {
    margin-top: 20px;
}

.backend-kicker {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: #f4ca79;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.backend-card h1,
.backend-card h2,
.backend-card h3 {
    margin-top: 0;
}

.backend-message,
.error-msg,
.success-msg {
    margin: 18px 0;
    padding: 14px 16px;
    border-radius: 16px;
    font-weight: 600;
}

.backend-message.error,
.error-msg {
    background: rgba(208, 58, 77, 0.18);
    color: #ffb4c2;
}

.backend-message.success,
.success-msg {
    background: rgba(52, 168, 83, 0.18);
    color: #b9f6ca;
}

.backend-form {
    display: grid;
    gap: 18px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-grid.full,
.form-row.full {
    grid-column: 1 / -1;
}

.backend-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

.backend-form input[type="text"],
.backend-form input[type="email"],
.backend-form input[type="password"],
.backend-form input[type="file"],
.backend-form textarea,
.backend-form input[type="url"] {
    width: 100%;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    border-radius: 16px;
    padding: 14px 16px;
    font-size: 15px;
}

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

.backend-form input::placeholder,
.backend-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.45);
}

.primary-btn,
.backend-form button,
.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    border: none;
    border-radius: 999px;
    background: #e6b65c;
    color: #17130d;
    padding: 13px 24px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
}

.primary-btn:hover,
.backend-form button:hover,
.button-link:hover {
    background: #f2cb7d;
    color: #17130d;
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.stats-grid,
.backend-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.mini-card,
.stat-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 22px;
    padding: 18px;
}

.stat-card strong {
    display: block;
    font-size: 28px;
    margin-top: 8px;
    color: #fff;
}

.user-hero {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 22px;
}

.user-meta p {
    margin: 6px 0;
}

.panel-table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
    border-radius: 18px;
}

.panel-table th,
.panel-table td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    text-align: left;
}

.panel-table th {
    color: #f4ca79;
    background: rgba(255, 255, 255, 0.03);
}

.panel-table tr:hover td {
    background: rgba(255, 255, 255, 0.03);
}

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

.audio-preview {
    width: 220px;
    max-width: 100%;
}

.pagination {
    margin-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.backend-footer {
    margin-top: 18px;
    color: rgba(255, 255, 255, 0.76);
}

@media (max-width: 860px) {
    .stats-grid,
    .backend-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .backend-topbar,
    .user-hero {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 900px) {
    body {
        font-size: 19px;
    }

    .backend-shell {
        padding: 24px 16px 56px;
    }

    .backend-card {
        padding: 24px 20px;
        border-radius: 24px;
    }

    .backend-brand {
        gap: 16px;
    }

    .backend-brand strong {
        font-size: 28px;
        line-height: 1.25;
    }

    .backend-brand span,
    .muted,
    .user-meta p,
    .panel-table th,
    .panel-table td,
    .backend-form label,
    .backend-form input,
    .backend-form textarea,
    .backend-form select,
    .backend-links a,
    .pagination,
    .backend-footer {
        font-size: 18px;
        line-height: 1.75;
    }

    .backend-kicker {
        font-size: 12px;
        letter-spacing: 2px;
    }

    .backend-card h1 {
        font-size: 34px;
        line-height: 1.25;
    }

    .backend-card h2 {
        font-size: 28px;
        line-height: 1.3;
    }

    .backend-mobile-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        align-self: flex-end;
        width: 50px;
        height: 50px;
        font-size: 26px;
    }

    .backend-links {
        width: 100%;
        gap: 12px;
        display: none;
    }

    .backend-links.open {
        display: grid;
    }

    .backend-links a {
        display: block;
        width: 100%;
        padding: 14px 16px;
        border-radius: 16px;
        background: rgba(255,255,255,0.06);
    }

    .profile-avatar.large {
        width: 108px;
        height: 108px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
    }

    .stat-card {
        padding: 18px;
    }

    .stat-card strong {
        font-size: 34px;
    }

    .desktop-song-table {
        display: none;
    }

    .mobile-song-list {
        display: grid;
        gap: 16px;
    }

    .mobile-song-card {
        padding: 18px;
        border-radius: 20px;
        background: rgba(255,255,255,0.05);
    }

    .mobile-song-head {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 10px;
        font-size: 20px;
    }

    .mobile-song-head strong {
        font-size: 21px;
        line-height: 1.45;
    }

    .mobile-audio-preview {
        width: 100%;
    }

    .inline-actions,
    .mobile-song-actions {
        gap: 12px;
    }

    .inline-actions > *,
    .mobile-song-actions > * {
        flex: 1 1 calc(50% - 12px);
    }

    .mobile-song-actions a,
    .inline-actions a,
    .inline-actions button,
    .inline-actions .button-link {
        text-align: center;
        padding: 14px 16px;
        border-radius: 14px;
        background: rgba(255,255,255,0.06);
        font-size: 17px;
    }

    .panel-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .panel-table th,
    .panel-table td {
        padding: 16px 14px;
    }

    .primary-btn,
    .backend-form button,
    .button-link {
        width: 100%;
        font-size: 18px;
        padding: 16px 18px;
    }
}

@media (min-width: 901px) {
    .mobile-song-list {
        display: none;
    }
}