body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0f172a;
    color: #f8fafc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}

.card {
    background: #1e293b;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    text-align: center;
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
    border: 1px solid #334155;
}

h2 {
    margin-top: 0;
    font-size: 26px;
    color: #f1f5f9;
}

p {
    color: #94a3b8;
    font-size: 14px;
    margin-bottom: 20px;
}

.error-msg {
    background-color: rgba(239, 68, 68, 0.15);
    border: 1px solid #ef4444;
    color: #fca5a5;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-top: 15px;
    text-align: left;
}

.btn {
    border: none;
    padding: 14px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    width: 100%;
    margin-top: 20px;
    transition: all 0.2s ease;
}

.primary {
    background-color: #6366f1;
    color: white;
}

.primary:hover {
    background-color: #4f46e5;
}

.success {
    background-color: #10b981;
    color: white;
}

.success:hover {
    background-color: #059669;
}

.btn:disabled {
    background-color: #334155;
    color: #64748b;
    cursor: not-allowed;
}

.file-list-container {
    margin-top: 20px;
    max-height: 200px;
    overflow-y: auto;
    background: #0f172a;
    border-radius: 8px;
    border: 1px solid #334155;
    text-align: left;
}

.file-list {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.placeholder-text {
    color: #64748b;
    text-align: center;
    margin: 20px 0;
}

.file-item {
    background: #1e293b;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #334155;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
}

.file-item span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 320px;
    color: #e2e8f0;
}

.file-item small {
    color: #94a3b8;
    white-space: nowrap;
}

.delete-btn {
    background: transparent;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 4px;
}

.delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}