:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --calendar-color: #6f42c1;
            --weekend-color: #e83e8c;
        }.result-container{overflow:auto;padding:0px;border:0px}
         .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;  color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .mode-selector {
            display: flex;
            margin-bottom: 1.5rem;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .mode-btn {
            flex: 1;
            padding: 1rem;
            background-color: white;
            border: none;
            text-align: center;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .mode-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        .mode-btn:hover:not(.active) {
            background-color: var(--light-gray);
        }
        .date-input-container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .date-input-group {
            flex: 1;
            min-width: 200px;
        }
        .date-result-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .day-display {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--calendar-color);
            margin-bottom: 0.5rem;
            text-align: center;
        }
        .date-display {
            font-size: 1.2rem;
            text-align: center;
            margin-bottom: 1rem;
            color: var(--text-color);
        }
        .weekday-badge {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            background-color: var(--primary-color);
            color: white;
            margin: 0 auto;
        }
        .weekend-badge {
            background-color: var(--weekend-color);
        }
        .calendar-container {
            position: relative;
            width: 100%;
            margin: 2rem 0;
        }
        .calendar {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 5px;
            background-color: white;
            border-radius: 8px;
            padding: 1rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        .calendar-header {
            background-color: var(--primary-color);
            color: white;
            padding: 0.75rem;
            text-align: center;
            font-weight: 600;
            border-radius: 4px;
        }
        .calendar-day {
            padding: 0.75rem;
            text-align: center;
            border-radius: 4px;
            transition: all 0.2s;
            border: 1px solid transparent;
        }
        .calendar-day:hover {
            background-color: rgba(44, 125, 160, 0.1);
        }
        .calendar-day.selected {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .calendar-day.weekend {
            background-color: rgba(232, 62, 140, 0.1);
            color: var(--weekend-color);
        }
        .calendar-day.other-month {
            color: #aaa;
        }
        .calendar-day.today {
            border: 2px solid var(--accent-color);
        }
        .calendar-box {
            background-color: rgba(111, 66, 193, 0.05);
            border-left: 3px solid var(--calendar-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            .date-input-container {
                flex-direction: column;
            }
        }
        .date-examples {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .example-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
        }
        .example-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .calculation-step {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .date-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .date-table th, .date-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .date-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .date-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .weekday-legend {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1rem 0;
        }
        .legend-item {
            display: flex;
            align-items: center;
        }
        .legend-color {
            width: 20px;
            height: 20px;
            border-radius: 4px;
            margin-right: 0.5rem;
        }
        .weekday-color {
            background-color: rgba(44, 125, 160, 0.8);
        }
        .weekend-color {
            background-color: rgba(232, 62, 140, 0.8);
        }
        .today-color {
            border: 2px solid var(--accent-color);
            background-color: white;
        }
        .quick-date-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .quick-date-btn {
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 0.5rem 1rem;
            cursor: pointer;
            transition: all 0.2s;
        }
        .quick-date-btn:hover {
            background-color: var(--light-gray);
            border-color: var(--primary-color);
        }
        .zeller-formula {
            background-color: rgba(111, 66, 193, 0.05);
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid var(--calendar-color);
            margin: 1.5rem 0;
            font-family: 'Courier New', monospace;
        }