:root {
    --bg-color: #f4f7f6;
    --text-color: #2c3e50;
    --card-bg: #ffffff;
    --danger-color: #d9534f;
    --safe-color: #5cb85c;
    --border-radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background-color: #1a252f;
    color: white;
    padding: 40px 0;
    text-align: center;
    margin-bottom: 30px;
}

.header p {
    color: #95a5a6;
    margin-top: 10px;
}

.status-banner {
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: bold;
    margin-bottom: 30px;
}

.status-danger {
    background-color: #fdf2f2;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.status-safe {
    background-color: #f0fdf4;
    color: var(--safe-color);
    border: 1px solid var(--safe-color);
}

.closure-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding-bottom: 50px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-top: 4px solid var(--danger-color);
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.po-number {
    font-weight: bold;
    font-size: 1.1em;
}

.date {
    font-size: 0.85em;
    color: #7f8c8d;
}

.card h3 {
    font-size: 1.2em;
    margin-bottom: 10px;
    color: #2c3e50;
}

.tag {
    display: inline-block;
    background: #fdf2f2;
    color: var(--danger-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: bold;
    margin-bottom: 15px;
}

.species {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 20px;
    flex-grow: 1;
}

.btn {
    display: text;
    text-align: center;
    background-color: var(--danger-color);
    color: white;
    text-decoration: none;
    padding: 10px;
    border-radius: 4px;
    font-weight: bold;
    transition: background 0.2s;
}

.btn:hover {
    background-color: #c9302c;
}

footer {
    text-align: center;
    padding: 30px;
    color: #7f8c8d;
    font-size: 0.9em;
}