:root {
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --accent: #4CAF50;
    --accent-hover: #45a049;
    --error: #cf6679;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.upload-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#drop-zone {
    border: 2px dashed #555;
    padding: 2rem;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.3s;
}

#drop-zone:hover {
    border-color: var(--accent);
}

textarea {
    width: 100%;
    height: 150px;
    background: #333;
    border: 1px solid #555;
    color: #fff;
    padding: 1rem;
    border-radius: 4px;
    resize: vertical;
}

button {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--accent-hover);
}

button:disabled {
    background-color: #555;
    cursor: not-allowed;
}

.secondary-btn {
    background-color: transparent;
    border: 1px solid #555;
    font-size: 0.8rem;
    padding: 5px 10px;
}

.secondary-btn:hover {
    background-color: #333;
    border-color: #777;
}

.report-meta {
    margin-bottom: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.stat-card h3 {
    margin-top: 0;
    color: #888;
}

.stat-card .count {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent);
}

#unknown-list {
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-radius: 8px;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #444;
}

th {
    color: var(--accent);
    font-weight: 600;
}

.ua-cell {
    font-family: monospace;
    font-size: 0.9em;
    color: #bbb;
    word-break: break-all;
}

.error {
    color: var(--error);
    text-align: center;
    padding: 2rem;
}