:root {
    --primary-color: #0f3057; /* Deep Navy Blue */
    --secondary-color: #008891; /* Emerald/Teal Green */
    --accent-color: #e7e7de;
    --text-main: #333333;
    --bg-light: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
}

.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.text-success {
    color: var(--secondary-color) !important;
}

.brand-text {
    letter-spacing: -0.5px;
}

/* Customizing Bootstrap buttons to fit the theme */
.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover, .btn-check:checked + .btn-outline-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Calculator Card */
.calc-card {
    border-top: 4px solid var(--primary-color) !important;
    border-radius: 0.5rem;
}

/* Result Cards */
.result-card {
    border-left: 4px solid var(--secondary-color) !important;
    transition: transform 0.2s ease;
}

.result-card:hover {
    transform: translateY(-2px);
}

/* Input tweaks */
.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.25rem rgba(0, 136, 145, 0.25);
}

/* Accordion tweaks */
.accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background-color: rgba(15, 48, 87, 0.05);
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.125);
}

/* Table tweaks */
.table-responsive {
    max-height: 400px;
    overflow-y: auto;
}
.table thead th {
    position: sticky;
    top: 0;
    z-index: 1;
    background-color: #f8f9fa;
}