:root {
    --primary-green: #2e7d32;
    --light-green: #e8f5e9;
    --gold: #fbc02d;
    --earth-dark: #3e2723;
    --earth-light: #d7ccc8;
    --white: #ffffff;
    --text-main: #333333;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --border-radius: 12px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-main);
    background-color: #f9faf9;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background-color: var(--primary-green);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-nav a {
    color: var(--white);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

/* Calculator Grid */
.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    margin: 40px 0;
}

.calc-form {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: sticky;
    top: 80px;
    height: fit-content;
}

.form-group { margin-bottom: 15px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; }
.form-group input, .form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--earth-light);
    border-radius: 8px;
    font-size: 16px;
}

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--light-green);
    padding: 20px;
    border-radius: var(--border-radius);
    border-left: 5px solid var(--primary-green);
    box-shadow: var(--shadow);
}

.stat-card.gold { border-left-color: var(--gold); background: #fffde7; }
.stat-card h3 { font-size: 14px; color: #555; text-transform: uppercase; }
.stat-card .value { font-size: 28px; font-weight: bold; color: var(--primary-green); }

@media (max-width: 768px) {
    .calculator-wrapper { grid-template-columns: 1fr; }
    .site-header .container { flex-direction: column; gap: 15px; }
}