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

:root {
    --bg: #0d0f14;
    --surface: #161a22;
    --surface-2: #1e2330;
    --border: #2a2f3d;
    --accent: #4A9EFF;
    --accent-hover: #3b8ae6;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #22c55e;
    --warn: #f59e0b;
    --text: #e8eaed;
    --text-2: #9ca3af;
    --text-3: #6b7280;
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

.app {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 24px 0 8px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.view {
    flex: 1;
    flex-direction: column;
}

/* Login */
.login-card {
    max-width: 420px;
    width: 100%;
    margin: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.login-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.hint {
    color: var(--text-2);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

/* Form */
.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-2);
    margin-bottom: 5px;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--accent);
}

.form-group input::placeholder {
    color: var(--text-3);
}

.optional {
    color: var(--text-3);
    font-weight: 400;
}

.required {
    color: var(--danger);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s, transform 0.1s;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-full { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-danger-outline {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}
.btn-danger-outline:hover { background: var(--danger); color: #fff; }

.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

/* Dashboard */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 16px 0;
    gap: 12px;
    flex-wrap: wrap;
}

.device-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 14px;
}

.badge-label {
    font-size: 0.75rem;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.badge-id {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 500;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.card-full-width {
    grid-column: 1 / -1;
}

/* Section header */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Profiles Grid */
.profiles-section {
    margin-bottom: 24px;
}

.profiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}

.profiles-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 20px;
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-3);
}

.profile-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 12px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.profile-card:hover {
    border-color: var(--accent);
    background: var(--surface-2);
    transform: translateY(-2px);
}

.profile-card.selected {
    border-color: var(--accent);
    background: rgba(74, 158, 255, 0.08);
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.15);
}

.profile-card-avatar {
    width: 56px;
    height: 56px;
}

.profile-card-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.profile-card-badge {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
    color: var(--accent);
    background: rgba(74, 158, 255, 0.12);
    padding: 2px 8px;
    border-radius: 10px;
}

/* Profile Details */
.profile-details {
    margin-bottom: 24px;
}

.profile-details-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 20px;
}

.profile-details-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.profile-avatar-lg {
    width: 48px;
    height: 48px;
}

.profile-details-info h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.profile-badge {
    display: inline-block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
    color: var(--accent);
    background: rgba(74, 158, 255, 0.12);
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
}

.truncate {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
}

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px 0;
}

.card-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.card-body {
    padding: 16px 20px;
    flex: 1;
}

.card-footer {
    padding: 0 20px 18px;
    border-top: 1px solid var(--border);
    padding-top: 14px;
    margin-top: 4px;
}

/* Status */
.status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.status-badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}

.status-badge.active {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.status-badge.inactive {
    background: rgba(107, 114, 128, 0.15);
    color: var(--text-3);
}

.info-text {
    color: var(--text-2);
    font-size: 0.85rem;
    margin-bottom: 14px;
    line-height: 1.5;
}

/* Locked items */
.locked-items-list {
    max-height: 200px;
    overflow-y: auto;
}

.locked-items-list::-webkit-scrollbar { width: 4px; }
.locked-items-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.locked-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.locked-item:last-child { border-bottom: none; }

.locked-item-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.locked-item-type {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-3);
    background: var(--surface-2);
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.locked-item-name { color: var(--text); }
.locked-item-actions { display: flex; gap: 6px; flex-shrink: 0; }

.btn-danger-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}
.btn-danger-sm:hover { background: var(--danger); color: #fff; }

.btn-accent-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}
.btn-accent-sm:hover { background: var(--accent); color: #fff; }

.btn-refresh {
    padding: 6px 14px;
    font-size: 0.8rem;
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.btn-refresh:hover { background: var(--accent); color: #fff; }

h4 {
    font-size: 0.85rem;
    color: var(--text-2);
    margin-bottom: 8px;
    margin-top: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.no-items {
    color: var(--text-3);
    font-size: 0.82rem;
    font-style: italic;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.2s ease;
    backdrop-filter: blur(4px);
}

.modal-dialog {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-3);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close:hover { color: var(--text); }

.modal-body {
    padding: 20px 24px;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding: 0 24px 20px;
}

/* Avatar Selector */
.avatar-selector {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 8px;
    margin-top: 4px;
}

.avatar-option {
    width: 44px;
    height: 44px;
    border: 2px solid transparent;
    border-radius: 50%;
    cursor: pointer;
    background: none;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.avatar-option:hover {
    border-color: var(--border);
    transform: scale(1.1);
}

.avatar-option.selected {
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(74, 158, 255, 0.3);
    transform: scale(1.1);
}

/* Toggle */
.toggle-label {
    display: flex !important;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem !important;
    color: var(--text) !important;
}

.toggle-label input[type="checkbox"] {
    appearance: none;
    width: 44px;
    height: 24px;
    background: var(--border);
    border-radius: 12px;
    position: relative;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
}

.toggle-label input[type="checkbox"]::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--text);
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle-label input[type="checkbox"]:checked {
    background: var(--accent);
}

.toggle-label input[type="checkbox"]:checked::after {
    transform: translateX(20px);
}

.toggle-text {
    font-weight: 500;
}

.child-disclaimer {
    margin-top: 8px;
    padding: 12px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-sm);
}

.child-disclaimer p {
    color: var(--warn);
    font-size: 0.8rem;
    line-height: 1.5;
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    z-index: 3000;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    animation: slideIn 0.3s ease;
    max-width: 360px;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* Confirm overlay */
.confirm-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
    animation: fadeIn 0.2s ease;
}

.confirm-dialog {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 380px;
    width: 90%;
    text-align: center;
}

.confirm-dialog h3 { margin-bottom: 8px; font-size: 1.1rem; }
.confirm-dialog p { color: var(--text-2); font-size: 0.88rem; margin-bottom: 20px; }
.confirm-actions { display: flex; gap: 10px; }
.confirm-actions .btn { flex: 1; }

footer {
    text-align: center;
    padding: 24px 0 8px;
    color: var(--text-3);
    font-size: 0.78rem;
    margin-top: auto;
}

/* FAQ */
.faq-section {
    margin-top: 8px;
    margin-bottom: 24px;
}

.faq-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.faq-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: none;
    border: none;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
    gap: 12px;
}

.faq-question:hover { background: var(--surface-2); }

.faq-arrow {
    color: var(--text-3);
    font-size: 0.85rem;
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 18px;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 18px 16px;
}

.faq-answer p {
    color: var(--text-2);
    font-size: 0.85rem;
    line-height: 1.65;
}

/* Playlist Type Toggle */
.playlist-type-toggle {
    display: flex;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.playlist-type-toggle .type-btn {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-2);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.playlist-type-toggle .type-btn:hover {
    background: rgba(74, 158, 255, 0.08);
    color: var(--text-1);
}

.playlist-type-toggle .type-btn.selected {
    background: var(--accent);
    color: #fff;
}

.password-field {
    position: relative;
    display: flex;
    align-items: center;
}

.password-field input {
    flex: 1;
    padding-right: 40px;
}

.btn-toggle-pw {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-3);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    border-radius: 4px;
    transition: color 0.15s;
}

.btn-toggle-pw:hover {
    color: var(--text-1);
}

/* Responsive */
@media (max-width: 700px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }

    .device-badge {
        justify-content: center;
    }

    .login-card {
        padding: 24px 20px;
    }

    .profiles-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    }

    .avatar-selector {
        grid-template-columns: repeat(4, 1fr);
    }

    .profile-details-header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
}