:root {
    --primary: #000000;
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #10b981;
    /* Green for recycling */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
    padding: 40px 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
}

p.subtitle {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
}

.btn {
    width: 100%;
    padding: 14px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
}

/* Success Message */
.success-card {
    text-align: center;
    display: none;
}

.success-icon {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--accent);
}

/* Admin Styles */
.admin-container {
    max-width: 1000px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
}

.stat-val {
    font-size: 32px;
    font-weight: 700;
    display: block;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.chart-container {
    background: white;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.chart-container h3 {
    margin-bottom: 20px;
    font-size: 16px;
}

.table-container {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th,
td {
    padding: 12px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: #f8fafc;
    font-weight: 600;
    color: var(--text-muted);
}