:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --border-color: #000000;
    --header-bg: #e6b800;
    /* Gold/Yellow from screenshot */
    --header-text: #000000;
    --section-bg: #f0f0f0;
    --input-bg: #ffffff;
    --highlight-bg: #ffffcc;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    /* Standard font like Excel */
    background-color: #f5f5f5;
    color: var(--text-color);
    padding: 20px;
    font-size: 14px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

header h1 {
    font-size: 24px;
    text-transform: uppercase;
    color: #800000;
    /* Dark red/brown from screenshot header */
}

/* Main Grid Layout */
.main-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    align-items: start;
}

/* Sticky Right Column for Desktop */
.right-col {
    position: sticky;
    top: 20px;
    align-self: start;
    height: auto;
    max-height: 95vh;
    overflow-y: auto;
    /* Allow scroll if sidebar is too tall */
}

/* Section Styling */
.section-box {
    position: relative;
    border: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.section-header {
    background: var(--header-bg);
    padding: 5px 10px;
    font-weight: bold;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    font-size: 13px;
}

.section-content {
    padding: 10px;
    background: white;
}

/* Form Elements */
.input-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 2px;
}

.input-row:last-child {
    border-bottom: none;
}

.input-row label {
    font-weight: bold;
    font-size: 12px;
    flex: 1;
}

.input-row input,
.input-row select {
    flex: 1;
    padding: 4px;
    border: 1px solid #ccc;
    font-size: 12px;
    text-align: right;
}

.input-row select {
    text-align: left;
}

/* Table Styling */
.table-responsive {
    overflow-x: auto;
}

.package-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.package-table th {
    background: var(--header-bg);
    border: 1px solid var(--border-color);
    padding: 5px;
    text-align: center;
}

.package-table td {
    border: 1px solid #ccc;
    padding: 1px;
}

.package-table input,
.package-table select {
    width: 100%;
    border: none;
    padding: 2px;
    text-align: center;
    background: transparent;
}

.package-table input:focus {
    background: #e6f7ff;
    outline: none;
}

/* Freight Rates (Results) */
.freight-rates-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.freight-rates-table th,
.freight-rates-table td {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
}

.freight-rates-table th {
    text-align: left;
    background: #f0f0f0;
}

.freight-rates-table td.amount {
    text-align: right;
    font-weight: bold;
}

.freight-rates-table tr.total-row {
    background: var(--header-bg);
    font-weight: bold;
}

.calculate-btn {
    width: 100%;
    padding: 10px;
    background: #800000;
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
    text-transform: uppercase;
}

.calculate-btn:hover {
    background: #a00000;
}

/* Optional Surcharges */
.optional-section {
    margin-top: 10px;
    border: 1px solid #ccc;
    padding: 10px;
    max-height: 150px;
    overflow-y: auto;
}

.checkbox-item {
    display: block;
    margin-bottom: 5px;
    font-size: 12px;
}

.hidden {
    display: none;
}

/* Utility */
.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 10px;
        width: 100%;
        border: none;
        box-shadow: none;
    }

    /* Stack the main grid */
    .main-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* Adjust header for mobile */
    header div {
        flex-direction: column;
        gap: 5px !important;
    }

    header h1 {
        font-size: 20px;
    }

    header img {
        height: 50px !important;
    }

    /* Reposition the contact links at top right */
    header>div:nth-child(2) {
        position: static !important;
        margin-top: 10px;
        align-items: center !important;
        width: 100%;
    }

    /* Make inputs larger for touch targets */
    .input-row {
        flex-direction: column;
        align-items: flex-start;
        padding-bottom: 8px;
    }

    .input-row label {
        margin-bottom: 4px;
        font-size: 14px;
    }

    .input-row input,
    .input-row select {
        width: 100%;
        font-size: 16px;
        /* Prevents iOS zoom */
        padding: 8px;
    }

    /* Table adjustments */
    .section-header {
        font-size: 14px;
        padding: 8px;
    }

    .package-table th,
    .package-table td {
        padding: 4px;
        font-size: 11px;
    }

    .package-table input,
    .package-table select {
        font-size: 13px;
    }

    /* Button sizing */
    .btn-calculate {
        padding: 20px;
        font-size: 18px;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        border-radius: 0;
        background: #990000;
        /* Slightly lighter for visibility */
    }

    /* Add padding to bottom of body to account for fixed button */
    body {
        padding-bottom: 80px;
        padding-left: 5px;
        padding-right: 5px;
    }

    /* Adjust warning boxes */
    .warning-box,
    #wwef-notification,
    #no-service-warning {
        font-size: 0.9em;
    }

    /* Modal/Overlays */
    #wwef-limit-overlay,
    #wwef-unavailable-overlay {
        min-width: 90% !important;
        width: 90% !important;
        padding: 20px !important;
    }
}