:root {
    --primary: #2d6a4f;
    --secondary: #40916c;
    --bg-light: #f8f9fa;
    --text-dark: #1b4332;
    --white: #ffffff;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background-color: var(--bg-light);
    color: var(--text-dark);
}

.dashboard-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: #081c15;
    color: white;
    padding: 2rem 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.logo span { color: #52b788; }

.nav-btn {
    width: 100%;
    background: transparent;
    border: none;
    color: #95d5b2;
    padding: 12px;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: 0.3s;
}

.nav-btn.active, .nav-btn:hover {
    background: #1b4332;
    color: white;
}

/* Main Content Area */
.content {
    flex: 1;
    padding: 3rem;
}

section { display: none; }
section.active-section { display: block; }

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    margin-top: 1.5rem;
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

/* Upload Area */
.upload-zone {
    border: 2px dashed #d8e2dc;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    min-height: 200px;
    transition: 0.3s;
}

.upload-zone:hover { border-color: var(--primary); background: #f1f8f4; }

/* Inputs & Buttons */
.input-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; font-size: 0.9rem; }
input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    box-sizing: border-box;
}

.submit-btn {
    grid-column: span 3;
    background: var(--primary);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.result-banner {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    background: #e9f5ee;
    font-weight: 600;
    display: none;
}