.time-display {
            padding: 18px 20px;
            background-color: white;
            border-radius: 8px;
            border: 1px solid #e9ecef;
            font-size: 1.4rem;
            font-family: 'Courier New', monospace;
            margin: 8px 0;
            text-align: center;
            box-shadow: 0 2px 6px rgba(0,0,0,0.03);
        }
        .time-display .label {
            font-size: 0.85rem;
            color: #6c757d;
            font-family: 'Segoe UI', sans-serif;
            font-weight: 500;
        }
        .time-display .value {
            font-weight: 700;
            color: #1a2a3a;
            letter-spacing: 0.5px;
        }
        .time-display .offset-badge {
            font-size: 0.8rem;
            background: #e7f1ff;
            padding: 2px 12px;
            border-radius: 20px;
            color: #0d6efd;
            font-weight: 500;
            margin-left: 8px;
        }
        .result-diff {
            font-size: 2rem;
            font-weight: 700;
            color: #0d6efd;
            padding: 12px 0;
        }
        .result-diff .sign {
            font-size: 1.8rem;
            color: #6c757d;
        }
        .info-card {
            background: #f8faff;
            border-radius: 10px;
            padding: 1.2rem 1.5rem;
            border-left: 4px solid #0d6efd;
            margin: 1.2rem 0;
        }
        .info-card.warning {
            border-left-color: #ffc107;
            background: #fffbf0;
        }
        .info-card.success {
            border-left-color: #198754;
            background: #f0faf5;
        }
        .zone-select {
            margin-bottom: 0.5rem;
        }
        .zone-select select {
            cursor: pointer;
        }
        .timezone-canvas {
            width: 100%;
            height: auto;
            background: #fafcff;
            border: 1px solid #dde4ed;
            border-radius: 10px;
            margin-top: 1.5rem;
            display: block;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        }
        .canvas-container {
            text-align: center;
            margin-top: 1rem;
        }
        .legend {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin: 0.8rem 0 0.2rem 0;
            font-size: 0.9rem;
        }
        .legend-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .legend-color {
            width: 18px;
            height: 18px;
            border-radius: 4px;
        }
        .legend-color.blue { background: #0d6efd; }
        .legend-color.green { background: #198754; }
        .legend-color.gray { background: #adb5bd; }
        .legend-color.gold { background: #ffc107; }
        .legend-color.red { background: #dc3545; }
        .timezone-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .timezone-table th, .timezone-table td {
            padding: 0.65rem 0.75rem;
            border: 1px solid #e9ecef;
        }
        .timezone-table th {
            background: #f1f4f9;
            font-weight: 600;
        }
        .timezone-table tr:nth-child(even) {
            background: #fafcff;
        }
        .dst-badge {
            background: #ffc107;
            color: #000;
            padding: 0.1rem 0.6rem;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-left: 6px;
        }
        .utc-label {
            font-family: 'Courier New', monospace;
            font-weight: 600;
            color: #1a2a3a;
        }
        .tool-header .lead {
            font-weight: 400;
            color: #3d4a5a;
        }
        .deep-dive p {
            text-align: justify;
        }
        .unit-note {
            font-size: 0.9rem;
            color: #6c757d;
        }
        .coord-input {
            margin-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            .time-display {
                font-size: 1.1rem;
                padding: 14px;
            }
            .result-diff {
                font-size: 1.5rem;
            }
            .legend {
                gap: 0.8rem;
                font-size: 0.8rem;
            }
        }