.days-calculator-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: #f9fafb;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.calculator-title {
    color: #1f2a44;
    text-align: center;
    margin-bottom: 20px;
    font-weight: 600;
}

.calculator-form {
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 200px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #34495e;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 2px solid #4a90e2;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: #ff6b6b;
    outline: none;
    box-shadow: 0 0 4px rgba(255, 107, 107, 0.2);
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 18px;
    border: none;
    border-radius: 5px;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-calculate {
    background: #4a90e2;
    color: white;
}

.btn-calculate:hover {
    background: #5fa8f0;
    transform: scale(1.03);
}

.btn-today {
    background: #2ecc71;
    color: white;
}

.btn-today:hover {
    background: #40d983;
    transform: scale(1.03);
}

.btn-reset {
    background: #ff6b6b;
    color: white;
}

.btn-reset:hover {
    background: #ff8787;
    transform: scale(1.03);
}

.result-box {
    margin-top: 20px;
}

.result-highlight {
    background: #f4f7fa;
    padding: 20px;
    border-left: 5px solid #4a90e2;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.result-highlight h4 {
    color: #1f2a44;
    margin-bottom: 10px;
    font-weight: 600;
}

.result-highlight h4 span {
    color: #ff6b6b;
    font-weight: 700;
}

.result-highlight p {
    color: #34495e;
    margin: 5px 0;
    font-size: 15px;
}

.result-units {
    list-style: none;
    padding: 0;
    margin-top: 10px;
}

.result-units li {
    padding: 6px 0;
    color: #34495e;
    font-size: 14px;
}

.result-units li span {
    color: #4a90e2;
    font-weight: 600;
}

.alert-error {
    background: #ffe6e6;
    color: #721c24;
    padding: 12px;
    border-radius: 5px;
    margin-top: 20px;
    font-size: 14px;
}

.calendar-section {
    margin-top: 30px;
}

.calendar-title {
    color: #1f2a44;
    margin-bottom: 10px;
    font-weight: 600;
}

.calendar-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.calendar-table th,
.calendar-table td {
    border: 1px solid #e0e4e8;
    padding: 8px;
    text-align: center;
    font-size: 13px;
}

.calendar-table th {
    background: #f8fafc;
    color: #34495e;
}

.included-day {
    background: #d0f0e8;
    font-weight: 600;
}