:root {
    --color-primary: #1D4ED8;
    --color-secondary: #059669;
    --color-background: #F3F4F6;
    --color-card: #FFFFFF;
    --color-text-dark: #1F2937;
    --color-border: #D1D5DB;
    --color-quickfill: #FEF3C7;
    --color-quickfill-text: #B45309;
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    background-color: var(--color-background);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    color: var(--color-text-dark);
}

.calculator-container {
    width: 100%;
    max-width: 100hw;
    min-width: 100hw;
    display:block;
}

.calculator-wrapper {
    text-align: center;
    margin: 20px;
    background-color: var(--color-card);
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
    display: block;
}

h1 {
    color: var(--color-primary);
    margin-bottom: 8px;
    font-size: 2em;
    font-weight: 700;
}

.intro-text {
    margin-bottom: 24px;
    color: #6B7280;
    font-size: 0.95em;
}

.quick-fill-section {
    background-color: var(--color-quickfill);
    border: 1px solid #FCD34D;
    padding: 16px;
    border-radius: 6px;
    margin-bottom: 24px;
    text-align: left;
}

.quick-fill-section label {
    font-weight: 600;
    color: var(--color-quickfill-text);
    display: block;
    margin-bottom: 8px;
}

.quick-fill-input-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap; 
}

#quickFillSalary {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1em;
    flex-shrink: 0;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
    min-width: 0;
}

.quick-fill-note {
    font-size: 0.8em;
    color: var(--color-quickfill-text);
    margin-top: 8px;
}

.btn {
    padding: 10px 18px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: background-color 0.15s ease-in-out;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-card);
    width: 100%;
    margin-top: 16px;
}

.btn-primary:hover {
    background-color: #047857;
}

.quick-fill-button {
    background-color: #FBBF24;
    color: var(--color-text-dark);
    flex-shrink: 0;
    width: auto;
    min-width: 150px; 
}

.quick-fill-button:hover {
    background-color: #F59E0B;
}

.table-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: 24px;
}

#salaryTable {
    width: 100%;
    border-collapse: collapse;
    min-width: 300px;
}

#salaryTable thead th {
    background-color: #E5E7EB;
    color: var(--color-text-dark);
    padding: 12px;
    text-align: left;
    position: sticky;
    top: 0;
    font-weight: 600;
}

#salaryTable tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}

#salaryTable tbody tr:nth-child(even) {
    background-color: #F9FAFB;
}

.salary-input {
    width: 95%;
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1em;
    text-align: right;
    box-shadow: inset 0 1px 1px rgba(0,0,0,0.03);
}

.result-container {
    margin-top: 24px;
    padding: 20px;
    background-color: #D1FAE5;
    border-radius: 6px;
    border-left: 4px solid var(--color-secondary);
    text-align: left;
}

.result-container h2 {
    color: var(--color-text-dark);
    margin-top: 0;
    font-size: 1.25em;
    margin-bottom: 8px;
}

#totalSalaryEarned {
    font-size: 1em;
    font-weight: 500;
    color: #4B5563;
    margin: 5px 0;
}

#result {
    font-size: 2em;
    font-weight: 800;
    color: var(--color-primary);
    margin: 10px 0 0 0;
}

.info-note {
    margin-top: 20px;
    padding: 12px;
    background-color: #E5E7EB;
    border-radius: 6px;
    font-size: 0.85em;
    color: #4B5563;
    text-align: left;
}

@media (max-width: 640px) {

    .calculator-container {
        padding: 20px;
        margin: 10px;
    }

    h1 {
        font-size: 1.5em; 
    }

    .quick-fill-input-group {
        flex-direction: column;
        gap: 8px;
    }

    .quick-fill-button {
        width: 100%;
        min-width: unset;
    }

    #quickFillSalary {
        width: calc(100% - 20px);
    }

    .btn-primary {
        padding: 10px 18px; 
    }

    #result {
        font-size: 1.5em;
    }
}