:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --card-bg: #1e293b;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --border-color: #334155;
    --tab-inactive: #475569;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 600;
}

header p {
    color: #94a3b8;
    margin-top: 0.5rem;
}

.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.tab-btn {
    flex: 1;
    background-color: transparent;
    color: var(--tab-inactive);
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.75rem;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: var(--text-color);
    background-color: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: var(--text-color);
    background-color: var(--accent-color);
}

.tab-content.hidden {
    display: none !important;
}

.drop-zone {
    border: 2px dashed var(--accent-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    background-color: rgba(59, 130, 246, 0.05);
}

.drop-zone:hover, .drop-zone.dragover {
    background-color: rgba(59, 130, 246, 0.15);
    border-color: var(--text-color);
}

.drop-zone .icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.hidden {
    display: none !important;
}

.table-container {
    background-color: #0f172a;
    border-radius: 8px;
    overflow: hidden;
    margin-top: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

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

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

th {
    background-color: #1e293b;
    font-weight: 600;
    position: sticky;
    top: 0;
}

tr:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 1.5rem;
    width: 100%;
}

.btn.primary {
    background-color: var(--accent-color);
    color: white;
}

.btn.primary:hover {
    background-color: var(--accent-hover);
}

#extract-status {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: #10b981;
}