:root {
    --primary-bg-color: #1e1e1e;
    /* Background color */
    --primary-text-color: #e0e0e0;
    /* Text color */
    --secondary-text-color: #2e2e2e;
    /* Secondary text color */
    --card-bg-color: #282828;
    /* Card background color */
    --accent-color: #86d1fc;
    /* Accent color */
    --accent-hover-color: #47bbff;
    /* Accent color */
    --inverted-accent-color: #2785bb;
    /* Accent color */
    --success-color: #03da88;
    /* Success color */
    --warning-color: #ffb74d;
    /* Warning color */
    --error-color: #ef5350;
    /* Error color */
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--primary-bg-color);
    color: var(--primary-text-color);
}

/* Smooth transition for theme changes */
body,
input,
select,
button,
.card,
.dashboard,
.cbc-table,
.recommendation {
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Light mode styles (optional override using :root) */
body.light-mode {
    --primary-bg-color: #f8f9fa;
    --primary-text-color: #1e1e1e;
    --secondary-text-color: #ffffff;
    --card-bg-color: #ffffff;
    --accent-color: #007acc;
    --accent-hover-color: #3399ff;
    --inverted-accent-color: #005fa3;
    --success-color: #008060;
    --warning-color: #e69500;
    --error-color: #d32f2f;
}

/* Toggle button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--card-bg-color);
    color: var(--primary-text-color);
    border: 1px solid var(--accent-color);
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    z-index: 1000;
    font-weight: bold;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 1920px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

h2 {
    color: var(--accent-color);
    text-align: center;
}

.dashboard {
    margin: 0 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.card {
    background: var(--card-bg-color);
    border-radius: 12px;
    padding: 20px;
    width: calc(100% - 10px);
}

form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    height: auto;
}

label {
    display: flex;
    flex-direction: column;
    gap: 5px;
}


button {
    grid-column: 1 / -1;
    padding: 12px;
    background: var(--accent-color);
    color: var(--secondary-text-color);
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
    text-transform: uppercase;
}

button:hover {
    background: var(--accent-hover-color);
    /* Changed to use root variable */
}

button:active {
    background: var(--inverted-accent-color);
    /* Changed to use root variable */
}

.cbc-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

.cbc-table th,
.cbc-table td {
    padding: 12px;
    border-bottom: 1px solid #333;
    text-align: left;
}

.cbc-table thead {
    background-color: var(--primary-bg-color);
    color: var(--accent-color);
}

.cbc-table tr:hover {
    background-color: #1a1a1a;
}

.low {
    color: var(--warning-color);
}

.normal {
    color: var(--success-color);
}

.high {
    color: var(--error-color);
}

.recommendation {
    margin-top: 20px;
    background-color: var(--card-bg-color);
    padding: 15px;
    border-left: 4px solid var(--accent-color);
}

canvas#wbcChart {
    width: 100% !important;
    height: auto !important;
    max-height: 400px;
    display: none;
}

canvas#wbcChart.active {
    display: block;
}

.placeholder-text {
    text-align: center;
    color: #777;
    font-style: italic;
    padding: 20px 0;
}

.analyze-btn.loading {
    pointer-events: none;
    opacity: 0.8;
    background-color: #666;
    transition: all 0.3s ease;
}

.analyze-btn .spinner {
    border: 2px solid #f3f3f3;
    border-top: 2px solid #fff;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    display: inline-block;
    margin-right: 8px;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@media (max-width: 1199px) {
    form {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

@media (max-width: 1099px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
}

/* Dark input and select styling */
input,
select {
    background-color: var(--primary-bg-color);
    color: var(--primary-text-color);
    border: 1px solid #8a8a8a;
    padding: 10px;
    border: none;
    border-radius: 6px;
}


input::placeholder {
    color: #aaa;
}

/* Optional: Refine scrollbar appearance */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-thumb {
    background-color: #444;
    border-radius: 4px;
}

::-webkit-scrollbar-track {
    background-color: #222;
}