:root {
    --lego-yellow: #FFED00; --lego-red: #E3000B; --lego-blue: #006CB7;
    --lego-green: #00A651; --lego-orange: #FF8C00; --lego-teal: #00BCD4;
    --lego-purple: #9C27B0; --lego-black: #1D1D1B; --lego-dark-gray: #4A4A4A;
    --lego-medium-gray: #8A8A8A; --lego-light-gray: #F4F4F5; --lego-border: #E8E8EA;
    --lego-white: #FFFFFF; --canvas-bg: #F7F7F8; --brick-radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Nunito', sans-serif; background: var(--canvas-bg); color: var(--lego-black); }

.admin-auth { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.admin-auth.hidden { display: none; }
.auth-box { background: var(--lego-white); border-radius: 16px; padding: 48px 36px; text-align: center; max-width: 420px; width: 90%; box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.08); border: 1px solid var(--lego-border); }
.auth-box h2 { font-size: 1.4rem; font-weight: 900; margin-bottom: 8px; }
.auth-box p { color: var(--lego-medium-gray); font-weight: 600; margin-bottom: 24px; }
.auth-input { width: 100%; padding: 14px 20px; border: 2px solid var(--lego-border); border-radius: var(--brick-radius); font-family: 'Nunito', sans-serif; font-size: 1rem; font-weight: 700; text-align: center; outline: none; margin-bottom: 16px; background: var(--canvas-bg); }
.auth-input:focus { border-color: var(--lego-blue); background: white; }
.auth-btn { width: 100%; padding: 14px; background: var(--lego-black); color: white; border: none; border-radius: var(--brick-radius); font-family: 'Nunito', sans-serif; font-size: 1rem; font-weight: 800; cursor: pointer; text-transform: uppercase; letter-spacing: 1px; }
.auth-btn:hover { opacity: 0.9; }
.auth-error { color: var(--lego-red); font-weight: 700; margin-top: 12px; font-size: 0.9rem; display: none; }
.auth-error.show { display: block; }

.admin-panel { display: none; }
.admin-panel.visible { display: block; }
.admin-header { background: var(--lego-black); color: white; padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 100; }
.admin-header h1 { font-size: 1.2rem; font-weight: 900; }
.admin-header-actions { display: flex; gap: 8px; }

.btn { padding: 10px 20px; border: none; border-radius: 8px; font-family: 'Nunito', sans-serif; font-weight: 800; font-size: 0.85rem; cursor: pointer; text-transform: uppercase; letter-spacing: 0.5px; transition: opacity 0.2s; }
.btn:hover { opacity: 0.85; }
.btn-yellow { background: var(--lego-yellow); color: var(--lego-black); }
.btn-orange { background: var(--lego-orange); color: white; }
.btn-blue { background: var(--lego-blue); color: white; }
.btn-green { background: var(--lego-green); color: white; }
.btn-gray { background: var(--lego-light-gray); color: var(--lego-dark-gray); }
.btn-sm { padding: 6px 12px; font-size: 0.75rem; }
.btn-danger { background: #FFEBEE; color: var(--lego-red); }

.admin-content { max-width: 900px; margin: 0 auto; padding: 24px 16px; }

.admin-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.admin-tab { padding: 10px 20px; border-radius: 8px; font-weight: 800; font-size: 0.85rem; cursor: pointer; background: var(--lego-white); border: 2px solid var(--lego-border); transition: all 0.2s; text-transform: uppercase; letter-spacing: 0.5px; }
.admin-tab:hover { border-color: var(--lego-medium-gray); }
.admin-tab.active { background: var(--lego-black); color: white; border-color: var(--lego-black); }

.tab-content { display: none; }
.tab-content.active { display: block; }

.item-list { margin-bottom: 24px; }
.admin-item { background: var(--lego-white); border: 1px solid var(--lego-border); border-radius: var(--brick-radius); padding: 16px 20px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; transition: box-shadow 0.2s; }
.admin-item:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.item-drag { cursor: grab; color: var(--lego-medium-gray); font-size: 1.2rem; user-select: none; flex-shrink: 0; }
.item-drag:active { cursor: grabbing; }
.item-color { width: 6px; height: 40px; border-radius: 3px; flex-shrink: 0; }
.item-info { flex: 1; min-width: 0; }
.item-info .item-title { font-weight: 800; font-size: 0.95rem; display: flex; align-items: center; gap: 6px; }
.item-info .item-meta { font-size: 0.8rem; color: var(--lego-medium-gray); font-weight: 600; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 400px; }
.item-actions { display: flex; gap: 6px; flex-shrink: 0; }

.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); display: none; align-items: center; justify-content: center; z-index: 1000; padding: 16px; }
.modal-overlay.show { display: flex; }
.modal { background: var(--lego-white); border-radius: 16px; padding: 32px; max-width: 600px; width: 100%; max-height: 90vh; overflow-y: auto; box-shadow: 0 24px 48px rgba(0,0,0,0.2); }
.modal h2 { font-size: 1.3rem; font-weight: 900; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 800; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--lego-dark-gray); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; border: 2px solid var(--lego-border); border-radius: 8px; font-family: 'Nunito', sans-serif; font-size: 0.95rem; font-weight: 600; outline: none; transition: border-color 0.2s; background: var(--canvas-bg); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--lego-blue); background: white; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-check { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.form-check input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--lego-red); }
.form-check label { font-weight: 700; font-size: 0.9rem; margin: 0; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 24px; }
.form-hint { font-size: 0.75rem; color: var(--lego-medium-gray); font-weight: 600; margin-top: 4px; }

.toast { position: fixed; bottom: 24px; right: 24px; background: var(--lego-black); color: white; padding: 14px 24px; border-radius: 10px; font-weight: 800; font-size: 0.9rem; box-shadow: 0 8px 24px rgba(0,0,0,0.2); transform: translateY(100px); opacity: 0; transition: all 0.3s; z-index: 2000; }
.toast.show { transform: translateY(0); opacity: 1; }

.empty-state { text-align: center; padding: 48px 24px; color: var(--lego-medium-gray); font-weight: 700; }
.empty-state .empty-emoji { font-size: 3rem; margin-bottom: 12px; }

.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-header h3 { font-size: 1rem; font-weight: 800; }

.section-divider { border-top: 1px dashed var(--lego-medium-gray); margin: 24px 0 16px; padding-top: 16px; }
.section-divider h4 { font-size: 0.9rem; color: var(--lego-blue); margin-bottom: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.5px; }

.tools-section { background: var(--lego-white); border: 2px dashed var(--lego-border); border-radius: var(--brick-radius); padding: 24px; margin-bottom: 24px; }
.tools-section p { color: var(--lego-medium-gray); font-weight: 600; margin-bottom: 12px; font-size: 0.9rem; }
.tools-header { font-size: 1.1rem; font-weight: 800; color: var(--lego-black); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }

.sortable-ghost { opacity: 0.4; }

@media(max-width:480px) {
    .admin-header { flex-direction: column; gap: 12px; text-align: center; }
    .form-row { grid-template-columns: 1fr; }
    .modal { padding: 24px 20px; }
    .item-actions { flex-direction: column; }
}