/* Container and Layout */
.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin-top: 10px;
}

.btn-option {
    background: #161b28;
    border: 1px solid #3b82f6;
    color: white;
    padding: 15px 10px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-option:hover {
    background: #3b82f6;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(59, 130, 246, 0.3);
}

/* Drop Zone Styles */
.drop-zone {
    background: #161b28;
    border: 2px dashed #1e293b;
    border-radius: 20px;
    padding: 50px 20px;
    text-align: center;
    margin-bottom: 30px;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 10px;
    background: #0b0f19;
    border-radius: 20px;
    margin: 20px auto;
    overflow: hidden;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    transition: width 0.3s ease;
}

/* Loader */
.loader {
    border: 4px solid #1e293b;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.success-icon {
    display: block;
    margin-bottom: 15px;
}