.app-container {
    max-width: 1000px;
    margin: 0 auto;
}
.form-step {
    display: none;
    animation: fadeIn var(--transition-speed) ease-out;
}
.form-step.active {
    display: block;
}
.wizard-progress {
    position: relative;
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    padding: 0 1rem;
}
.wizard-progress::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--border-color);
    z-index: 0;
    transform: translateY(-50%);
}
.wizard-step-item {
    position: relative;
    z-index: 1;
    background-color: var(--bg-main);
    padding: 0 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    transition: color var(--transition-speed);
}
.step-indicator {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    transition: all var(--transition-speed);
}
.wizard-step-item.active {
    color: var(--primary-color);
}

.wizard-step-item.active .step-indicator {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-main);
}
input[type="text"],
input[type="number"],
input[type="tel"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}
.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
@media (min-width: 768px) {
    .form-grid.cols-2 { grid-template-columns: 1fr 1fr; }
    .form-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
    .span-2 { grid-column: span 2; }
}
.product-row {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;

    border-left: 4px solid var(--secondary-color, var(--primary-color)); 
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed);
}
.product-row:hover {
    transform: translateY(-2px);
}
.row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}
.row-body {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.img-preview-box {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    background-color: var(--bg-main);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.img-preview-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.img-placeholder {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}
.product-inputs {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    align-items: end;
}
.checkbox-custom {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-main);
    cursor: pointer;
    height: 48px;
}
.checkbox-custom input {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: none;
    gap: 0.5rem;
}
.btn-primary {
    background-color: var(--primary-color);
    color: white;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}
.btn-secondary {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-secondary:hover {
    background-color: var(--border-color);
}
.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}
.btn-danger:hover {
    background-color: var(--error);
    color: white;
}
.btn-success {
    background-color: var(--success);
    color: white;
    width: 100%;
}
.btn-success:hover {
    filter: brightness(1.1);
}
.wizard-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
@media (max-width: 640px) {
    .row-body {
        flex-direction: column;
    }
    .img-preview-box {
        width: 100%;
        height: 150px;
    }
    .wizard-step-item span {
        display: none;
    }
    .wizard-progress {
        justify-content: center;
        gap: 1rem;
    }
}